mtg.wtf

If you would guess a card, instead just choose the outcome you want.
At the beginning of each opponent's upkeep, look at the top card of their library. Tell them the name of that card. They tell you its mana cost, type line, power, and toughness. Then reveal that card. If they got anything wrong, draw a card.

{1}, {T}: Choose a tournament-legal Mox you don't control at random. Create a token that's a copy of it. Then if you control all ten, create a Mox Lotus token. (The ten are Amber, Chrome, Diamond, Emerald, Jet, Opal, Pearl, Ruby, Sapphire, and Tantalite. Perhaps roll a d10?)
{W}{U}{B}{R}{G}: Untap The Mox Painter.

Eminence — As long as Efteekay is in the command zone or on the battlefield, other Kavu spells you cast cost {1} less to cast.
Whenever Efteekay or another Kavu you control enters, it deals damage equal to its power to target creature.

Whenever a card is exiled because it was warped, put three time counters on it. It gains suspend.

When Pirk enters, create a legendary Spacecraft token. It's a 2/2 with flying at 6+. Name it.
Whenever you fully station a Spacecraft, draw a card. (A Spacecraft is fully stationed when you unlock its highest station number.)

Whenever The Policy Maker enters or attacks, ask a player outside the game to propose a new rule. If each player in the game agrees to the rule, apply it for the rest of the game. If an opponent doesn't agree to the rule, put a +1/+1 counter on The Policy Maker.

During your turn, The River Warlock has flying, lifelink, and indestructible.
Whenever The River Warlock attacks, you and defending player each draw a card, then discard a card. If you discarded a card with equal or greater mana value than the card that player discarded, look at their hand. Exile a nonland card from it until The River Warlock leaves the battlefield.

When Forestfolk enters the battlefield, you may search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
When Forestfolk leaves the battlefield, draw a card.

Rulebreaker — If Hadran, Naya Sunseeder is your Commander, you may include creature cards of power 4 or greater of any color in your deck regardless of color identity.
{T}: Add one mana of any color.
Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.

First strike, reach
At the beginning of combat on your turn, mill four cards. You may choose a creature card from among them and cast it. When you do, it gains haste, becomes a Zombie in addition to its other types, and enters the battlefield with X +1/+1 counters on it, where X is Halana and Alena and Gisa and Geralf's power.

Any number of Role enchantments can be attached to Maeve, Wearer of Many Hats. (You don't sacrifice the old one when you attach a new one.)
Maeve gets +1/+1 for each Role attached to it.
Whenever you attach a Role to Maeve, draw a card.

When Princess Snowfall enters the battlefield and at the beginning of your upkeep, create a token that's a copy of Seven Dwarves. When you do, each Dwarf you control deals 1 damage to any target.

Double strike
{U}{R}: Copy target instant or sorcery spell you control. Activate this ability only once.
{G}{U}: Copy target creature spell you control. Activate this ability only once. (Copies of permanent spells enter the battlefield as tokens.)

Whenever Shahrazad and Sindbad deals combat damage to an opponent, if there haven't been any subgames this match, players play a Magic subgame using their libraries as their decks. Each player who doesn't win the subgame loses half their life, rounded up.
{T}: Draw a card and reveal it. If it isn't a land card, discard it.

Whenever this creature attacks, look at the top six cards of your library. You may put a Cat creature card from among them onto the battlefield tapped and attacking. Put the rest of the cards on the bottom of your library in a random order. If you don't put a card onto the battlefield this way, create a token that's a tapped and attacking copy of Lurrus of the Dream-Den.

{3}{U}, {T}, Sacrifice another creature: Search your library for up to four cards that don't share a mana value, power, toughness, or card type with each other. Target opponent chooses two of those cards. Put the chosen cards into your graveyard and the rest into your hand. Then shuffle.

As this creature enters the battlefield, choose cosplay or science.
• Cosplay — Whenever you cast a creature or planeswalker spell, this creature's base power and toughness each become equal to that spell's mana value until end of turn.
• Science — Whenever you cast an instant or sorcery spell, this creature deals 2 damage to each opponent.

Whenever The Sprinkler of Stardust attacks, look at the top six cards of your library. You may put an instant or sorcery card from among them onto the battlefield tapped and attacking. It becomes a 2/2 creature with "Whenever this deals combat damage to an opponent, cast a copy of this card." (The 2/2 creature stays on the battlefield.) Put the rest of the cards on the bottom of your library in a random order.

{1}, {T}: Look at the top three cards of your library. Choose one of them that isn't a playtest card and say its name, then choose a category among power, toughness, or mana value. An opponent guesses in that category about that card, then reveal the card. If they guessed incorrectly, put the card into your hand. Then, put each card not put into your hand this way on the bottom of your library in any order.

When The Bus Runner enters, create a 4/4 Desert Vehicle artifact land token with crew 2. Put eight hour counters on it. It has "{T}: Add {C}" and "Whenever this token or a Gamer you control becomes tapped, remove an hour counter from this token. Then if it has no hour counters on it, each opponent loses 1 life, you gain 1 life, and put eight hour counters on this token."
Ready to run (You can have two commanders if both have ready to run.)

When The Majestic Duo enters, if you don't control another permanent named The Majestic Duo, create a token that's a copy of it, except it's not legendary, it has "Whenever this creature deals combat damage to a player, draw a card and earnestly tell them good luck," and it loses all other abilities.
Whenever this creature deals combat damage to a player, you and that player may each put a permanent card from your hand onto the battlefield. Offer them a high-five.

This enchantment enters with three resonance counters on it.
Whenever you cast a spell, you may remove a resonance counter from this enchantment. If you do, ask a person outside the game if the spell's name sounds like a non-Magic themed movie title. When a person answers yes, choose one —
• Put two +1/+1 counters on target creature.
• This enchantment deals 2 damage to target creature.
When this enchantment has no counters on it, sacrifice it.

As The Zabulous Cosplayer enters and at the beginning of your upkeep, choose a tournament-legal non-Aura permanent card at random. The Zabulous Cosplayer becomes a copy of that card, except it has this ability. (Use the "random card" feature on a Magic card search engine until you hit a permanent card.)

Defender, flying
When Shen enters, if you haven't scattered the Dragonstorm Globes this game, scatter them. (Create seven Dragonstorm Globe token cards and shuffle them into your library.)
Whenever a permanent named Dragonstorm Globe you control enters, draw a card. Then if you control seven permanents named Dragonstorm Globe, you win the game.

Whenever The Sprinkler of Stardust attacks, look at the top six cards of your library. You may put an instant or sorcery card from among them onto the battlefield tapped and attacking. It becomes a 2/2 creature with "Whenever this deals combat damage to an opponent, cast a copy of this card." (The 2/2 creature stays on the battlefield.) Put the rest of the cards on the bottom of your library in a random order.