Riverfall Mimic

Set: Eventide (#111)

Rarity: Common

Type: Creature — Shapeshifter

Mana Cost: {1}{U/R}

Colors: Red, Blue

P/T: 2/1

Whenever you cast a spell that's both blue and red, this creature has base power and toughness 3/3 until end of turn and can't be blocked this turn.