This is a sorcery-speed ability sadly, but with the right discard/self-mill, you can get those powerful creatures thrown away and bring them back without paying a mana cost
The card has star power too, being the latest addition to a series of stabbers containing all-time greats
This is true even if the spell is an instant
Creatures (10) Lands (17) Spells (34) In case this list is too baffling, the combo is animating a Worldgorger Dragon, creating a loop between its enters the battlefield trigger and leaves the battlefield trigger
Myriad on my best creature each turn lets me make a big impact on the game, that and the combination of first strike, vigilance, and trample might be my favorite
Many of these are either the best in their cycle or the best with their mechanic