Zekrom Wanderer

Creatures you control have haste.
Cascade, cascade (When you cast this spell,
exile cards from the top of your library until
you exile a nonland card that costs less.
You may cast it without paying its mana
cost. Put the exiled cards on the bottom in
a random order. Then do it again.)
Pokedex Entry: Concealing itself in lightning
clouds, it flies throughout the Unova region.
It creates electricity in its tail.