This can be a bit of a mind game
If you play it and then sacrifice it, the effect pretty much pays for itself, allowing it to act as a mana bank, or you can reanimate it to Treasure over and over
Play both Icetills, maximize your self mill
Weve seen a smattering of powerful Teferi cards such as Teferi, Hero of Dominaria, and Teferi, Time Raveler
These sliver creatures how powerful secondary abilities that they grant to your entire army including anthem effects, double strike, trample, haste, flying, lifelink, indestructible, loot, artifact destruction, draw effects, afflict, and many many more
It provides small fliers as chump blockers and sacrifice fodder, plus it triggers abilities like Marneus Calgar