Tezzeret's Æther Flood

(You may cast a legendary sorcery only if you control a legendary creature or planeswalker.)
Until end of turn, all permanents gain
"When this permanent leaves the battlefield, you may destroy up to two target permanents," then destroy target permanent.
"I don't care if we destroy the city in the process. If nothing else teaches the Renegades not to defy authority, this will."