When you planeswalk to Kilnspire District and at the beginning of your first main phase, put a charge counter on Kilnspire District, then add {R} for each charge counter on it.
Whenever chaos ensues, you may pay {X}. If you do, Kilnspire District deals X damage to any target.
Printings
From
$2.17
Buy
Rulings
1 Jun 2012
You choose the target of the chaos ability as you put that ability on the stack. When the ability resolves, you choose a value for X and decide whether to pay {X}. If you do decide to pay {X}, it’s too late for any player to respond since the ability is already in the midst of resolving.
1 Jun 2012
When you count the number of charge counters on Kilnspire District, count all charge counters on it, not just ones you put there.