Heartfire [War of the Spark] SPA Centinela de Janjeet where X is that artifact's

where X is that artifact's converted mana cost

players can't cast instant spells or activate abilities that aren't mana abilities

merrow aquitect

Set: Fifth Dawn Type: Artifact Common Cost: {5} Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it

Set: Gatecrash Type: Creature — Horror Rare Cost: {3}{U}{B} Consuming Aberration's power and toughness are each equal to the number of cards in your opponents' graveyards

Heartfire [War of the Spark] SPA Centinela de Janjeet where X is that artifact'sSet: War of the Spark Type: Instant Common Cost: {1}{R} As an additional cost to cast this spell, sacrifice a creature or planeswalker. Heartfire deals 4 damage to any target. The mage looked within and realized there was still one piece of fuel to burn.