Can I build a deck together with friends on TCGSwap?

Yes. Every deck on TCGSwap has a Collaboration Space. You can invite up to 5 friends; they can suggest card changes, discuss ideas, and playtest proposals. You review and apply suggestions before anything changes in your deck.

How does deck collaboration work?

It works like a pull request for your deck. Collaborators open the deck editor, make their proposed changes, and submit a suggestion with a note. You get notified, open the comparison view to see exactly what they changed, and choose to apply all, cherry-pick individual cards, or decline. Nothing changes in your deck until you approve it.

Can collaborators chat and discuss the deck?

Yes. The Collaboration Space has a shared group discussion thread for the whole deck, plus a per-suggestion Q&A thread for each proposal. You can @mention teammates and link specific cards inline.

Is collaborative deck building free?

Yes, collaboration is free for all TCGSwap users during beta. You can invite up to 5 collaborators per deck.

Does TCGSwap work for MTG, Pokémon, Yu-Gi-Oh and One Piece collaboration?

Yes. The Collaboration Space supports all four games — Magic: The Gathering, Pokémon TCG, Yu-Gi-Oh and One Piece. Format validation and card prices are included for each game.

Gum-Gum Champion Rifle · Extra Booster: Memorial Collection EB01-028/105

Gum-Gum Champion Rifle (Extra Booster: Memorial Collection EB01-028/105), R. Market price $2.11, down 2.5% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

[Counter] If your Leader has the [Impel Down] type, up to 1 of your Leader or Character cards gains +2000 power during this battle. Then, your opponent returns 1 of their active Characters to the owner's hand.

Weekly price history

Week	Market price
2026-W30	$4.82
2026-W31	$3.90
2026-W32	$3.34
2026-W33	$3.15
2026-W34	$2.95
2026-W35	$2.89
2026-W36	$2.79
2026-W37	$2.79
2026-W38	$2.37
2026-W39	$2.31

Questions

How much is Gum-Gum Champion Rifle EB01-028/105 worth?

Gum-Gum Champion Rifle from Extra Booster: Memorial Collection (EB01-028/105) has a market estimate of $2.11, down 2.5% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Gum-Gum Champion Rifle EB01-028/105 rare?

It is a R from Extra Booster: Memorial Collection, a 105-card set.

Browse more One Piece Card Game cards · All Extra Booster: Memorial Collection cards · Build a deck · Track your collection