Sifter of Skulls [Oath of the Gatewatch] Union Monster they tap all lands with

they tap all lands with mana abilities they control and lose all unspent mana

Set: Commander 2017 Type: Creature — Zombie Dragon Rarity: Rare Cost: {2}{B}{B} Flying

Set: Anthologies Type: Creature — Goblin Warrior Rarity: Common Cost: {R} {R}: Goblin Balloon Brigade gains flying until end of turn

Must be Special Summoned (from your Extra Deck) by sending 2 Level 5 or higher monsters you control with the same Level to the Graveyard (1 Tuner and 1 non-Tuner)

while a monster is equipped to it by this effect

Sifter of Skulls [Oath of the Gatewatch] Union Monster they tap all lands withSet: Oath of the Gatewatch Type: Creature Eldrazi Rarity: Rare Cost: {3}{B} Devoid (This card has no color.) Whenever another nontoken creature you control dies, create a 1 1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add {C}." ({C} represents colorless mana.)