Oracle

Legendary Planeswalker - Oko 

+1: Put two +1/+1 counters on up to one target creature you control.
0: Until end of turn, Oko, the Trickster becomes a copy of target creature you control. Prevent all damage that would be dealt to him this turn.
-7: Until end of turn, each creature you control has base power and toughness 10/10 and gains trample.

Tournooi-info

Legal in: Vintage, Legacy, Modern, Standard, Commander

Officiele rulings

10/4/2019
If Oko becomes a creature the same turn he enters the battlefield, you can’t attack with him or use any of his T abilities (if he gains any).

10/4/2019
While Oko is a creature, he isn’t a planeswalker. Damage dealt to him won’t cause him to lose loyalty.

10/4/2019
If the target creature is an illegal target by the time Oko’s second ability tries to resolve, the ability won’t resolve. Damage that would be dealt to Oko won’t be prevented.

10/4/2019
Oko copies the printed values of the target creature. It won’t copy counters on that creature or effects that have changed its power, toughness, types, color, or so on. Notably, it won’t copy effects that made the target creature become a creature if it isn’t normally a creature.

10/4/2019
If the target creature is copying something else, then Oko becomes a copy of whatever that creature copied.

10/4/2019
Oko’s last ability affects only creatures you control at the time it resolves. Creatures you begin to control later in the turn won’t be 10/10.

10/4/2019
Any effects that modify a creature’s power and/or toughness without setting them to a specific number or value will apply after its base power and toughness are set, regardless of the order in which those effects were created. The same is true of counters that modify its power and toughness.

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