Frontier Siege [Commander 2017] Modern Set: Ixalan Treasure Chest Type:

Set: Ixalan Treasure Chest Type: Legendary Enchantment // Legendary Land Rarity: Rare Cost: {1}{U} At the beginning of your upkeep

Plague-induced dreams became real as they swirled above Krov

each player starting with you may pay any amount of mana

"General nuisance

Frontier Siege [Commander 2017] Modern Set: Ixalan Treasure Chest Type:Set: Commander 2017 Type: Enchantment Rarity: Rare Cost: {3}{G} As Frontier Siege enters the battlefield, choose Khans or Dragons. Khans At the beginning of each of your main phases, add {G}{G}. Dragons Whenever a creature with flying enters the battlefield under your control, you may have it fight target creature you don't control.