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If it lands on tails, any time a spell is activated, the enemy gains 500LP

This means trading tempo for better mana development, which kind of sucks

It's critical to attach an Energy and play a Supporter card virtually every turn, and it's tough to pull that off without some extra help

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This Pikachu sits comfortably near the top of the set's value hierarchy, behind only a handful of the most premium chase cards

There's still the problem with supporting alt.win Decks and another with cycling for an OTK/otherwise large play, so you could let the effect go off during the End Phase (and let only one go off per turn).