Empe, Cry of Stones

Flying, flash, haste
{x}{u}{r}, {t}, Exile X instant and/or sorcery spells
you control: Draw up to X cards. Untap up to X
other target permanents you control.
At the beginning of each end step, if you cast
three or more instant or sorcery spells this turn,
Empe, Cry of Stones deals 4 damage to each permanent and each player.