This card is put into the battle zone tapped. [Blocker] Blocker This creature can't attack. Overdrive Water x1 and Darkness x1 (When this creature is summoned, you may tap an additional 1 Water and 1 Darkness card in your mana zone. If you do, this creature gains the following [OD] ability). [OD] Your opponent discards 1 card and you may draw 1 card.