You can use these token copies as a form of removal, but they can also become powerful additions to your board state
Each player has to sacrifice half of their non-god creatures, which usually leaves you ahead if you plan for it
You can use Transcendence to dig you out of a hole, and get rid of it before it ever makes you lose the game
Its good versus Cascade decks, Underworld Breach (without the ability to cast zero cmc spells over and over, they cant mill themselves and cast Thassas Oracle for the win), and to some extent Amulet (Chalice counters Summoners Pact)
3 Kaldra Compleat Batterskull used to be considered one of the best equipment pieces in the game, and then Kaldra Compleat came along and blew it out of the water
Future Sight allows playing from the topdeck while Helm of Awakening reduces the generic mana cost by one allowing repeated taping to draw and replaying of Sensei's Divining Top infinitely