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Creatures you control have vigilance.
[+1]: You gain 3 life.
[−2]: Put a +1/+1 counter on each creature you control and a loyalty counter on each other planeswalker you control.
If Ajani is somehow a creature as his last ability resolves, he’ll get a +1/+1 counter.
If a planeswalker you control is also a creature (most likely because it’s Gideon), that planeswalker receives both a +1/+1 counter and a loyalty counter as Ajani’s last ability resolves.
