At the beginning of your upkeep, Timberline Aqueduct deals 1 damage to target creature you control. When Timberline Aqueduct enters the battlefield, put a land you control on the bottom of its owner's library. : Add  to your mana pool. : Timberline Aqueduct becomes a 1/1 green and blue Elf creature with flying until end of turn. It's still a land.