Even if you only remove one or two things, the rate is still very good -other colors have occasionally encroached on whites removal philosophy in recent sets, but this card is still a clear staple for years to come
Players were quick to grasp this cards potential back when its back half was leaked
Here, my opponents decision to cycle a shark in to block my Familiar was punished by this sequence: play second Oven, sac second Familiar to get my third food, reanimate Feasting Troll King, cast Great Henge for just two mana, tap it to cast Uro and trigger Henge, sac Uro to second Oven (with his triggers on the stack) for two more food, use food to reanimate both Familiars (two more Henge triggers)
An Aura put onto the battlefield this way doesn't target anything (so it could be attached to a permanent an opponent controls with hexproof, for example), but the Aura's enchant ability restricts what it can be attached to
You can find them in Set and Collector Boosters, as well as in Bundles