It isn't so much about this being better than Mizzium Mortars or Oblitering Bolt but more about how much better your deck looks when you can replace a two drop with a one drop and lose almost nothing in doing so
If one of your opponents is playing reanimator, thats even better because theyre going to do the job of putting a good creature in their graveyard to help you
Even more impressive is that if the player has monsters in their spell/trap zone, they can banish up to 2 of those to summon a Fusion monster instead
Aang, Airbending Master Azlask, the Swelling Scourge Azula, Ruthless Firebender Daxos the Returned Ezuri, Claw of Progress Kalemne, Disciple of Iroas Katara, Waterbending Master Kelsien, the Plague Meren of Clan Nel Toth Minthara, Merciless Soul Mizzix of the Izmagnus Otharri, Suns' Glory Toph, Earthbending Master Zuko, Firebending Master
Its less subjective than heading into your local hobby store, and the BGS grade will give you a better idea of how much your prized cards are worth