Liberia

Flying
At the beginning of each opponent’s end step, if you didn’t lose life this turn, you gain 4 life. Otherwise, you lose 4 life.

Each creature assigns combat damage with its converted mana cost rather than its power.

, Sacrifice two creatures: Put target creature card in an opponent’s graveyard onto the battlefield under your control. Activate this ability only anytime you could cast a sorcery.

Mountainwalk
When Blizzard Entity enters the battlefield, search your library for three Mountain cards and put them onto the battlefield under an opponent’s control, then shuffle it. Sacrifice Blizzard Entity unless three Mountains were put onto the battlefield this way.

When Soil Entity enters the battlefield, put five 1/1 black Spirit creature tokens with flying onto the battlefield under target opponent’s control.
Creatures with flying can only block creatures with flying.