Lurking Firedrake

Haste, skulk
Whenever Lurking Firedrake becomes blocked,
it deals 1 damage to each creature and
planeswalker that creatures controller controls.
At the beginning of your end step, if you control
four or more mountains, search your library for a Dragon card and put it onto the battlefield. It
gains haste until your next turn. Sacrifice it at the beginning of your next end step.