Blast Zone

Text:

Blast Zone enters the battlefield with a charge counter on it.
: Add {C}.
, : Put X charge counters on Blast Zone.
, , Sacrifice Blast Zone: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Blast Zone.

Rulings:

• 5/3/2019 An activation cost of <img src="/Handlers/Image.ashx?size=small&amp;name=X&amp;type=symbol" alt="Variable Colorless" align="absbottom" /><img src="/Handlers/Image.ashx?size=small&amp;name=X&amp;type=symbol" alt="Variable Colorless" align="absbottom" /> means that you pay twice X. If you want X to be 3, you pay <img src="/Handlers/Image.ashx?size=small&amp;name=6&amp;type=symbol" alt="6" align="absbottom" /> to activate Blast Zone’s ability.
• 5/3/2019 Tokens that aren’t a copy of something else don’t have a mana cost. Anything without a mana cost normally has a converted mana cost of 0.
• 5/3/2019 If a permanent has <img src="/Handlers/Image.ashx?size=small&amp;name=X&amp;type=symbol" alt="Variable Colorless" align="absbottom" /> in its mana cost, X is considered to be 0.