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As an additional cost to cast this spell, sacrifice a Goblin. Goblin Grenade deals 5 damage to any target.

At the beginning of your upkeep, you may have this creature deal 1 damage to target player or planeswalker.

If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

Whenever a source you control deals damage to an opponent, you may put a quest counter on this enchantment. Remove four quest counters from this enchantment and sacrifice it: If any source you control would deal damage to a permanent or player this turn, it deals double that damage to that permanent or player instead.