Cephalid Coliseum

T: Add CC. This land deals 2 damage to you.

Boseiju enters tapped. T, Pay 2 life: Add C. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

T: Add C. T: This land deals 1 damage to target attacking creature. Activate only during the end of combat step.

(This land isn't a spell, it's affected by summoning sickness, and it has "T: Add G.")

T: Add one mana of any color. Whenever you tap this land for mana, target opponent creates a 1/1 colorless Spirit creature token.

Cumulative upkeep—Pay 2 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.) When this land enters, sacrifice a land. Creatures you control can't attack. Prevent all damage that would be dealt to you.

T: Add C. T: Add R or G. Each opponent gains 1 life.

T: Add C. T, Sacrifice a creature: You gain 1 life.