Alesha, Khanate Overlord

Creature cards you control have Dash X, where
X equals their converted mana cost minus 2.
(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.)
You have no maximum hand size.
Whenever a creature you control leaves the battlefield, you may have Alesha, Khanate
Overlord deal 1 damage to any target.