Since most Pokemon cards in TCG Pocket only need one Energy to retreat, X Speed often allows for a free withdrawal, making it highly effective
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Raging Phoenix's second effect only activates when it's in your Graveyard but allows you to Special Summon it after a face-up Fire attribute monster in your control is destroyed, and it gains the attack points of said monster
Although each of Mirror Swordknight's unique effects are only available to use once per turn, its tribute effect is useful in that it can be Normal Summoned, tributed to Special Summon Cornfield Coatl, and then Cornfield Coatl can add a second Mirror Swordknight or another helpful monster to your hand, with the tributed one being readily available in the Graveyard to ensure future monster effect prevention
If this card destroys a Defense Position monster as a result of battle, inflict damage to your opponent's Life Points equal to half of the DEF of the destroyed monster