Mudslide [Ice Age] Meld if that player controls a

if that player controls a Plains

Set: Eventide Type: Enchantment Rare Cost: {3}{W} When Endless Horizons enters the battlefield

Set: Scourge Type: Enchantment Rarity: Rare Cost: {2}{U} Whenever a creature dies

Aurelia is on the frontlines

Set: Portal Three Kingdoms Type: Sorcery Rare Cost: {2}{R}{R} Untap all creatures that attacked this turn

Mudslide [Ice Age] Meld if that player controls aSet: Ice Age Type: Enchantment Rare Cost: {2}{R} Creatures without flying don't untap during their controllers' untap steps. At the beginning of each player's upkeep, that player may choose any number of tapped creatures without flying they control and pay {2} for each creature chosen this way. If the player does, untap those creatures.