Combined with cards like Hymn to the Ages, it makes a nice blue-red spellslinger base, and its mana value of 2 means you don't have to put much work in to combine it with Dreadhorde Arcanist
At the start, it hinders the power of opponents' creatures
As you can see, from the eighteen months or so from Tempest to Urzas Legacy , ten of the strongest global enchantments of all time were printed
However, I find it interesting that the ones that were underrated in the beginning (Fury, Solitude) are now being the most dominant while the very hyped Grief did fall short of the expectations
Don't overextend if you suspect your opponent might be playing such a card
But Containment Priest is also surprisingly relevant against a large number of cards like Aether Vial, Green Sun's Zenith, and Natural Order and decks like Merfolk, Death and Taxes, Elves, and Maverick