Gaea's Liege [Unlimited Edition] Vraska whenever either of those creatures

whenever either of those creatures deals combat damage

Set: Amonkhet Invocations Type: Sorcery Rarity: Mythic Cost: {2}{W}{W} Destroy all creatures

Set: Portal Type: Sorcery Rarity: Rare Cost: {G} Search your library for a creature card

Set: Alpha Edition Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature

Then that player loses all unspent mana and you add the mana lost this way

Gaea's Liege [Unlimited Edition] Vraska whenever either of those creaturesSet: Unlimited Edition Type: Creature Avatar Rarity: Rare Cost: {3}{G}{G}{G} As long as Gaea's Liege isn't attacking, its power and toughness are each equal to the number of Forests you control. As long as Gaea's Liege is attacking, its power and toughness are each equal to the number of Forests defending player controls. {T}: Target land becomes a Forest until Gaea's Liege leaves the battlefield.