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

: Add  or to your mana pool.

Put Scrub Forge on top of your library: Add  to your mana pool.

: Scrub Forge becomes a 1/1 black and red Specter creature with first strike until end of turn. It's still a land.