Elusive Otter

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Creatures with power less than Elusive Otter's power can't block it.

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Grove's Bounty

Sorcery — Adventure

Distribute X +1/+1 counters among any number of target creatures you control. (Then exile this card. You may cast the creature later from exile.)