Silk, Second-Bitten

Deathtouch
Whenever Silk, Second-Bitten attacks, exile the
top card of your library. You may play that card
this turn and you may spend mana as though it
were mana of any color to cast that spell.
Dash {b}{r}(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.)