You start off with a small investment
Instant-speed pump spells are almost always the better option, as you can surprise your opponent during combat if they decide to declare blockers
Its a simple and well-communicated drawback, and powers up a card like Magmatic HellkiteMagmatic Hellkite in a straightforward but material way
How to beat: Collect every One-Star, Two-Star and Three-Star Shiny Card in the Mega Shine expansion: Scyther, Pineco, Phantump, Trevenant, Charmander, Charmeleon, Ponyta, Rapidash, Slowpoke, Pikachu, Raichu, Electrike, Hawlucha, Gastly, Haunter, Zorua, Zoroark, Forretress, Dratini, Dragonair, Dragonite, Axew, Fraxure, Haxorus, Mega Charizard X, Mega Slowbro X, Mega Manectric X, Mega Gengar X, Mega Scizor X, and Immersive Shiny Mew