Even if the opponent has Leyline of the Void or Rest in Peace that you dont have another answer for, Oko can turn your one- and zero-power creatures into 3/3s, giving your backdoor plan of attacking with horrible creatures some real teeth, especially against an opponent who maybe took too many mulligans to find a hate card
As we get into Rare and Super Rare the ink cost can be up to 8, with a larger amount of cards having two or three effects
Heres a sneaky little cheat to get unlimited items for everything stored there
0.4 per cent chance: 0.2 per cent per card (5th card probability rate, regular pack) Rainbow Full Art Moltres EX, Rainbow Full Art Machamp EX (Charizard Pack) 0.1 per cent chance: 0.05 per cent per card (4th card, regular pack)
These will certainly be draft-around bombs in limited, and I can see them having a big impact on Commander as well