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.

Helix Fossil · Arceus 93/99

Helix Fossil (Arceus 93/99), Common, 50 HP. Market price €0.19, unchanged this week. Illustrated by Ryo Ueda. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

More Helix Fossil printings

Helix Fossil · Genetic Apex
Helix Fossil · Majestic Dawn — €0.16

Card text

Poke-BODY: Aqua Reaction — When you attach a Water Energy card from your hand to Helix Fossil (excluding effects of attacks or Poké-Powers), search your deck for a card that evolves from Helix Fossil and put it onto Helix Fossil (this counts as evolving Helix Fossil). Shuffle your deck afterward.
Play Helix Fossil as if it were a Colorless Basic Pokémon. (Helix Fossil counts as a Trainer card as well, but if Helix Fossil is Knocked Out, this counts as a Knocked Out Pokémon.) Helix Fossil can't be affected by any Special Conditions and can't retreat. At any time during your turn before your attack, you may discard Helix Fossil from play. (This doesn't count as a Knocked Out Pokémon.)

Weekly price history

Week	Market price
2026-W31	€0.14
2026-W32	€0.15
2026-W33	€0.15
2026-W34	€0.17
2026-W35	€0.16
2026-W36	€0.15
2026-W37	€0.19
2026-W38	€0.18
2026-W39	€0.19
2026-W40	€0.19

Printings & variants

Reverse Holo — $1.75
Normal — $0.30

Price in context

Helix Fossil ranks #86 of the 105 priced cards in Arceus. The median Common in the set is €0.24. The 105 priced cards in Arceus are worth €661.40 together; this card is less than 0.1% of that. The set’s value is unchanged this week. Over the last 10 weeks the set’s value went from €770.55 to €661.40 (-14.2%).

Top chases in Arceus

Ponyta 46 — €61.12
Ponyta 72 — €61.12
Ponyta SH11 — €61.12
Shinx 74 — €52.00
Shinx SH12 — €52.00

Set value over 10 weeks · same 105 cards each week
Week	Set value
2026-W31	€770.55
2026-W32	€755.65
2026-W33	€694.30
2026-W34	€695.21
2026-W35	€696.23
2026-W36	€680.98
2026-W37	€684.18
2026-W38	€646.10
2026-W39	€661.40
2026-W40	€661.40