pokemon 64 card set 1st Edition Jungle (64/64) Complete 1999 [MP-DMG] Discard 1 Water Energy card to use this attack Pokémon Card Game: Deck Shield

To me, this puts Invasion of Ergamon solidly in the A-tier, as a card likely to be Standard playable along with some eternal upside if you squint hard enough

This is a holdover from the base game that I can't fix

A "creature source" is a permanent, spell, or card in any zone with the card type "creature." For example, Echo's ability can target a cycling ability you've activated if the discarded card is a creature card

Once Extraction Specialist leaves the battlefield, the creature that is returned can attack and block as normal

Trample is quite relevant in a format with Young Pyromancer , Ice-Fang Coatl and TNN

Thankfully, there is a lot of inspiration to draw from here