gengar full art pokemon card Mega EX #240 EXTENDED GX in play. Pokémon TCG Mega Gengar EX

It's a singular threat that incrementally attacks for 1 more each turn (outside of the minor synergy with exiling your own cards with After your opponent kills it, you're left with no residual threats to try to deal the last points of damage with (unless you manage to get 2-3 attacks in to draw some backup cards, which for most of the threats in this deck will already kill your opponent if similarly unanswered)

So, with Casey at the helm, three fresh cards can often be all it takes to turn an empty hand into a winning one

Paired with a card like Rhythm of the Wild, it's possible to give your creatures two instances of riot when entering

Tide Shaper can replace Spreading Seas and Rishadan Dockhand synergizes very well with Aether Vial