Mox Tantalite [Modern Horizons] Island and you may spend mana

and you may spend mana as though it were mana of any type to cast those spells

Set: Alpha Edition Type: Artifact Rarity: Rare Cost: {2} Time Vault enters the battlefield tapped

Set: Arabian Nights Type: Enchantment Rarity: Rare Cost: {G} At the beginning of your upkeep

Set: Portal Three Kingdoms Type: Sorcery Rarity: Rare Cost: {2}{R}{R} Untap all creatures that attacked this turn

Mox Tantalite [Modern Horizons] Island and you may spend manaSet: Modern Horizons Type: Artifact Rarity: Mythic Suspend 3{0} (Rather than cast this card from your hand, pay {0} and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost.) {T}: Add one mana of any color.