So far, the acorn stamp has only appeared in two sets: Unfinity and Mystery Booster 2
Daze is certainly up there as one of the best designed cards you can play for no mana although it might not feel like that when your hand is all four drops
If you want to kick it up a notch, you could even grab Saw in Half for a rather intense infinite combo
It boosts your entire board based on your speed, and if that werent enough, this Naya commander also gives your noncreature spells cost reduction for each point of speed you gain
This card essentially allows players to treat their Graveyard like a second hand , forcing opponents to consider not only what they might play, but also to remember what they've already played when formulating their strategy
Dont just cast Teferi and pass the turn unless you have a hand full of (free) counterspells