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

When Saltcrusted Ruins enters the battlefield, put a land you control on the bottom of its owner's library.

: Add  to your mana pool.

: Saltcrusted Ruins becomes a 2/2 green and white Angel creature with trample until end of turn. It's still a land.