mtg.wtf

Flying
When Mangled Soulrager enters, switch the power and toughness of each creature on the battlefield. You get a twelve-time boon with "Whenever a creature you control enters, switch its power and toughness."
Cycling {1}{U}

Once during each of your turns, you may cast a noncreature, non-Aura permanent spell from your graveyard. If you do, it perpetually becomes a 2/1 Rat creature in addition to its other types.

Ward—Pay 2 life.
Whenever Polterheist attacks, heist target opponent's library.

If you weren't the starting player, this spell costs {1} less to cast.
Manifest dread.
Rebound

Haste
Whenever Valiant Emberkin enters or attacks, target creature you control perpetually gets +1/+0.
If a creature you control becoming the target of a spell or ability causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Flying
When Wingbright Thief enters, target opponent reveals each nonland card in their hand. You choose one of them. That card perpetually gains "When you cast this spell, each opponent draws a card and gains 3 life."

Haste
Whenever one or more other creatures die, Soul Shredder perpetually gets +1/+1. This ability also triggers if Soul Shredder is in your graveyard.
Crew 1
{1}, Sacrifice two creatures: Return Soul Shredder from your graveyard to the battlefield. Activate only as a sorcery.