Unlike most cards, where you are limited to only four copies per deck, with Persistent Petitioners, you can have as many as you want
There was already a really strong Steel-Emerald deck in the meta, but Beast, Relentless looks set to supplant it
6 Crack In Time A somewhat narrow removal enchantment, Crack in Time exiles a creature an opponent controls when it comes into play, and also at the start of your precombat main phase
This artifact creature likely won't shine until it can find a deck chock full of creatures that devastate the opponent if they manage to swing in with double strike
This is a fairly edge-case interaction, but it's worth noting given how powerul the blue-black god has become
But what makes the Rector so much better is that you just toss the 'walker out onto the battlefield