Urza's Saga - The List (PLIST) ALA Spectator Seating enters the battlefield

Spectator Seating enters the battlefield tapped unless you have two or more opponents

If a Dinosaur is dealt damage this way

Choose one — • Exile each creature with power greater than the number of cards in your hand

Gravecrawler can't block

Urza's Saga - The List (PLIST) ALA Spectator Seating enters the battlefield(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.) I Urza's Saga gains "{T}: Add {C}." II Urza's Saga gains "{2}, {T}: Create a 0 0 colorless Construct artifact creature token with 'This creature gets +1 +1 for each artifact you control.'" III Search your library for an artifact card with mana cost {0} or {1}, put it onto the battlefield, then shuffle.