Glacial Chasm

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 U. This land deals 1 damage to you. Threshold — U, T, Sacrifice this land: Target player draws three cards, then discards three cards. Activate only if there are seven or more cards in your graveyard.

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.

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

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