Even though its a fire-type deck, Mega Charizard Y EX can one-shot any Pokemon in TCG Pocket
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You can then turn around and cast You Came Back, ready Mufasa, play a few card, go questing again, and get keep playing cards
Since Spirit of Yubel was destroyed, place Yubel onto the field and then special summon Gruesome Grave Squirmer to the field via its effect
Weakness: Lightning (x2) Resistance: Fighting (-30) Retreat: 0 Talonflame ex - Colorless - HP280 Stage 2 - Evolves from Fletchinder Ability: Excitedive If this Pokemon is in your hand, and you have a [C] Mega Evolution Pokemon in play, you may use this Ability
On the flip side, if your opponent's deck is very fast, you can consider mulliganing a slow hand so you don't fall behind