Oko, Lorwyn Liege #61

At the beginning of your first main phase, you may pay G. If you do, transform Oko. [+2]: Up to one target creature gains all creature types. (This effect doesn't end.) [+1]: Target creature gets -2/-0 until your next turn.

At the beginning of your first main phase, you may pay U. If you do, transform Oko. [-1]: Mill three cards. You may put a permanent card from among them into your hand. [-3]: Create two 3/3 green Elk creature tokens. [-6]: Choose a creature type. You get an emblem with "Creatures you control of the chosen type get +3/+3 and have vigilance and hexproof."