Impatient Otter

Whenever you cast your second spell each turn,
Impatient Otter gets zoomies until end of turn.
(Whenever this creature becomes blocked by a
creature, it deals damage equal to its power to the
blocking creature's controller. Then, its power
becomes 0 until end of turn.)

Whenever an opponent casts their second spell each
turn, they may pay {1}. If they don't, scry 1.

It would appear he's raring to fight.