Unmask [Mercadian Masques] Phyrexian Skeleton it produces colorless mana instead

it produces colorless mana instead of white mana

or triggered ability

When the ground is saturated with mana

Put the chosen cards on top of your library in any order

Set: Commander 2014 Type: Sorcery Rarity: Uncommon Cost: {2}{B}{B} Return target creature card from your graveyard to the battlefield

Unmask [Mercadian Masques] Phyrexian Skeleton it produces colorless mana insteadSet: Mercadian Masques Type: Sorcery Rarity: Rare Cost: {3}{B} You may exile a black card from your hand rather than pay this spell's mana cost. Target player reveals their hand. You choose a nonland card from it. That player discards that card.