While Oko is a creature, he isn't a planeswalker. Damage dealt to him won't cause him to lose loyalty.
2019-10-04
wotc
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.
2019-10-04
wotc
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.
2019-10-04
wotc
If the target creature is copying something else, then Oko becomes a copy of whatever that creature copied.
2019-10-04
wotc
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.
2019-10-04
wotc
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).
2019-10-04
wotc
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.
Format Legality
Standard
Not Legal
Future
Not Legal
Historic
Legal
Timeless
Legal
Gladiator
Legal
Pioneer
Legal
Modern
Legal
Legacy
Legal
Pauper
Not Legal
Vintage
Legal
Penny
Legal
Commander
Legal
Oathbreaker
Legal
Standardbrawl
Not Legal
Brawl
Legal
Alchemy
Not Legal
Paupercommander
Not Legal
Duel
Legal
Oldschool
Not Legal
Premodern
Not Legal
Predh
Not Legal
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