Constellar Pleiades (DT07-EN038) [Duel Terminal 7] DP46 You may spend blue mana

You may spend blue mana as though it were mana of any color to pay the activation costs of Quicksilver Elemental's abilities

there you will find aid and comfort

Set: Urza's Saga Type: Artifact Rarity: Uncommon Cost: {0} {1}

Set: Alpha Edition Type: Creature — Elemental Rarity: Rare Cost: {2}{G}{G}{G}{G} Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking

Constellar Pleiades (DT07-EN038) [Duel Terminal 7] DP46 You may spend blue manaSet: Duel Terminal 7 Card type: Xyz Effect Monster Rarity: Ultra Rare Attack: 2500 Defense: 1500 2 Level 5 LIGHT monsters Once per turn, during either player's turn: You can detach 1 Xyz Material from this card to target 1 card on the field; return that target to the hand.