black tutor cards mtg The 36 Best Tutors in Magic Ranked Magic: The Gathering has a

Narcomoeba came about because I was trying to think of a trigger we'd never done before

This is because whenever a nonland permanent an opponent owns enters the battlefield under your control, that player loses life equal to its mana value

Many such cards have a triggered ability that transforms the card (when it's on the battlefield.) One of the most typical such ability is " at the beginning of each upkeep, if no spells were cast last turn, transform (this card) ." Many players actually don't realize that this is a normal triggered ability that uses the stack, and therefore can be responded to

Or maybe you genuinely need the draw to finish off the game

The mana/card investment typically surpasses what your opponent paid for the threat, but it answers a number of must-remove permanent types

The game is managed externally