While it was beatable, it took over a large portion of the meta and warped a lot of card choices into a "play Affinity or beat Affinity" paradigm
In a vacuum, however, playing amongst friends with similar decks its good fun
Rarely are we presented with a three-mana planeswalker and the ones weve had so far have all made their mark
Instants can be cast at any time, including during other players' turns and while another spell or ability is waiting to resolve
When paired with Underworld Breach and Lion's Eye Diamond, it pays for its own escape cost as you repeatedly escape it and the Diamond, building the storm count until you have enough Brain Freeze copies on the stack to mill your opponents
This continuous trap card ripped up one of the foundational rules of the game - limiting players to a single Normal Summon per turn - all at the cost of just 500 life points, without a limitation on how often the effect could be used