Kurenei, Kage Heretic

Dash{2}{g/w}—(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.)
Bushido 3, First Strike.
When Kurenai, Kage Heretic is played without
paying its dash cost, all players cannot be dealt
combat damage until your next end step.