Fuyome, the Scarlet Fang

Whenever Fuyome, the Scarlet Fang becomes
blocked by a creature, you may have Fuyome,
the Scarlet Fang become a red Dragon with base
power and toughness 5/5 until end of turn.
Dash {2}{b} (You may cast this spell for its dash cost.
If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the
next end step.)