You can have one legal Otter in EDH, as a treat.

Between this and the “have a rat” card at common, they really don’t want you to pick X/1s very highly do they.

Frolicking Familiar - 2U
Creature - Otter Wizard (Uncommon)
Flying
Whenever you cast an instant or sorcery spell, Frolicking Familiar gets +1/+1 until end of turn.
2/2
//
Blow Off Steam - R
Instant - Adventure
Blow Off Steam deals 1 damage to any target.