Kilnspire District

-: When you planeswalk to Kilnspire District or at the beginning of your precombat main phase, (1/2)
-: (2/2) put a charge counter on Kilnspire District, then add (R) to your mana pool for each charge counter on it.
-: You may pay (X). If you do, Kilnspire District deals X damage to target creature or player.