Mr. House, President and CEO [Fallout] The Lost Caverns of Ixalan Special Guests " —Leidurr

" —Leidurr

put a flying counter on any creature you control if a creature card in your graveyard has flying

Each artifact you tap after you're done activating mana abilities pays for 1

A ghoulcaller's playground

Serra Ascendant gets +5/+5 and has flying

Mr. House, President and CEO [Fallout] The Lost Caverns of Ixalan Special Guests " —LeidurrSet: Fallout Type: Legendary Artifact Creature Human Rarity: Mythic Cost: {R}{W}{B} Whenever you roll a 4 or higher, create a 3 3 colorless Robot artifact creature token. If you rolled 6 or higher, instead create that token and a Treasure token. {4}, {T}: Roll a six sided die plus an additional six sided die for each mana from Treasures spent to activate this ability.