In the official announcement article, Wizards noted that these cards are getting the hammer Due to their power level, ability to accelerate mana, and/or status as free spells. The latter point easily explains two of the pre-bans here, Fireblast and Pyrokinesis
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However, you get a poison counter on your every upkeep that it stays on the field
Although, it does come at a cost since the Pokemon you choose to build will suffer through a couple of damage counters being placed on them
It gains haste (This creature can attack, and as soon as it comes under your control.) until end of turn
Sacrifice this Aura: Enchanted creature and other creatures that share a creature type with it get +2/-1 until end of turn