Xenk, Paladin Unbroken [Secret Lair Drop Series] Psychic If Gemstone Caverns has a

If Gemstone Caverns has a luck counter on it

Set: Theros Beyond Death Prerelease Promos Type: Enchantment Creature — Elemental Rarity: Mythic Cost: {4}{G}{G}{G} Trample

Pretending to be inside an invisible box was easy enough for Brug

Set: Sun & Moon: Burning Shadows Type: Psychic Rarity: Secret Rare Retreat cost: Colorless

any time you could activate a mana ability

Xenk, Paladin Unbroken [Secret Lair Drop Series] Psychic If Gemstone Caverns has aSet: Secret Lair Drop Series Type: Legendary Creature Human Knight Rarity: Rare Cost: {2}{W}{W} Double strike Auras you control have exalted. (Whenever a creature you control attacks alone, it gets +1 +1 until end of turn for each instance of exalted among permanents you control.)