They arent super competitive, but they match up well
It goes into just about anything, and provides value entering and leaving the battlefield
In this deck, you'll usually be using it to cast Lion's Eye Diamond over and over and Mill everyone out with Brain Freeze

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Then, you need to cast one of the saline-inducing cards in Magic: The Gathering, like Apocalypse or the recently unbanned Worldfire, to get it back onto the battlefield
As long as your devotion is high enough, Iroas is also a 7/4 creature that benefits from its own effects, making it a huge amount of damage to swing around the board that's very difficult to remove in combat