At the beginning of your end step, if you didn't cast any spells this turn, Timberland Coliseum deals 1 damage to you.

, Pay 1 life: Add  or to your mana pool.

, , Sacrifice Timberland Coliseum: Draw a card.

: Timberland Coliseum becomes a 2/2 green Stag creature until end of turn. It's still a land.