Customs Depot
{1}{U}
Enchantment
Oracle Text
Whenever you cast a creature spell, you may pay {1}. If you do, draw a card, then discard a card.
Watch Out
Cast trigger fires even if counteredWatch Out
This triggers when the spell is cast, before it resolves. Even if the spell is countered, the cast trigger still resolves. Copies of spells are not cast, so they won't trigger this.