Michael Danza

Embermages aren't well known for their diplomatic skills.

Fireblast

You may sacrifice two mountains instead of paying Fireblast's casting cost. Fireblast deals 4 damage to target creature or player.

You may sacrifice two Mountains rather than pay this spell's mana cost.
Fireblast deals 4 damage to any target.

"Where do you run when the earth becomes your enemy?"
—Naimah, Femeref philosopher

Tremor

Tremor deals 1 damage to each creature without flying.

Corrosion

Cumulative upkeep {1} (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)
At the beginning of your upkeep, put a rust counter on each artifact target opponent controls. Then destroy each artifact with mana value less than or equal to the number of rust counters on it. Artifacts destroyed this way can't be regenerated.
When this enchantment leaves the battlefield, remove all rust counters from all permanents.