Target creature gets +4/+4 and gains trample until end of turn.
"They say Head Judge Tezzeret will be reviewing every invention at the Fair. I made sure to build something that will stand out." —Jehvani, Vahadar artificer
When Yggdrasil enters, exile all creature cards from your graveyard. {T}: Exile the top three cards of your library. {4}, {T}: Put a creature card exiled with Yggdrasil onto the battlefield under your control. It gains haste until end of turn. Activate only as a sorcery.
When this creature enters, create a 1/1 black Rat creature token with "This creature can't block." Then for each Rat you control, create a Wicked Role token attached to that Rat.
"Look at this goblin, once wild, untamed, and full of idiocy. The Boros have given him the skill of a soldier and focused his heart with a single cause." —Razia
Trample As this creature enters, choose an opponent. Skyshroud War Beast's power and toughness are each equal to the number of nonbasic lands the chosen player controls.
Changeling You may have Moritte enter as a copy of a permanent you control, except it's legendary and snow in addition to its other types and, if it's a creature, it enters with two additional +1/+1 counters on it and has changeling.
Return up to two target creature cards from your graveyard to the battlefield. Each of those creatures is a black Zombie in addition to its other colors and types. Put Ever After on the bottom of its owner's library.
As this artifact enters, choose a color. Creatures you control of the chosen color get +1/+1. Whenever a land's ability causes you to add one or more mana of the chosen color, add one additional mana of that color.
I — Exile up to one target creature. II — Target creature you control gets +2/+2 and gains flying until end of turn. III — Return the exiled card to the battlefield under its owner's control.