Soulherder, Teleportation Circle, and Thassa, Deep-Dwelling are all cheaper and better, but not every deck can run them or wait until the end step
Both creatures work very well in their respective archetypes
Since the Altar turns that one Servo into two mana you're on your way to as many death, sacrifice, ETB triggers as you can handle, plus more colorless mana than you need
If you love the Time Lord and card games, then Doctor Who card sleeves are for you
*When a Fairy-type monster you control activates its effect you may Special Summon one fairy monster from you deck equal to that fairy's level regardless of summoning conditions
Auctioneers by operation of law: a) hold the defaulting buyer liable for the full purchase together with any buyers premium