Crashing Wave [Avatar: The Last Airbender]

Description

Set:	Avatar: The Last Airbender
Type:	Sorcery
Rarity:	Uncommon
Cost:	{U}{U}

As an additional cost to cast this spell, waterbend {X}. (While paying a waterbend cost, you can tap your artifacts and creatures to help. Each one pays for {1}.)
Tap up to X target creatures, then distribute three stun counters among tapped creatures your opponents control. (If a permanent with a stun counter would become untapped, remove one from it instead.)