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.

Shieldon · Mysterious Treasures 63/123

Shieldon (Mysterious Treasures 63/123), Uncommon, Stage1, 80 HP. Market price €0.14, unchanged this week. Illustrated by Kouki Saitou. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

A Pokémon that lived in jungles around 100 million years ago. Its facial hide is extremely hard.

Shieldon (National Pokédex #410) first appeared in Pokémon Diamond and Pearl (2006). Its earliest English cards in our catalogue are from 2007: DP Black Star Promos, Mysterious Treasures.

More Shieldon printings

Card text

Hard Face 20 — During your opponent's next turn, any damage done to Shieldon by attacks is reduced by 20 (after applying Weakness and Resistance).
Shield Attack 40+ — Flip a coin. If heads, this attack does 40 damage plus 20 more damage.

Weekly price history

Week	Market price
2026-W31	€0.19
2026-W32	€0.20
2026-W33	€0.20
2026-W34	€0.18
2026-W35	€0.18
2026-W36	€0.17
2026-W37	€0.16
2026-W38	€0.15
2026-W39	€0.14
2026-W40	€0.14

Printings & variants

Normal — $0.42
Reverse Holo — $3.02

Price in context

Shieldon ranks #111 of the 119 priced cards in Mysterious Treasures. The median Uncommon in the set is €0.31. The 119 priced cards in Mysterious Treasures are worth €393.93 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 €343.84 to €393.93 (+14.6%).

Top chases in Mysterious Treasures

Lucario 122 — €83.21
Time-Space Distortion 124 — €49.76
Magmortar 123 — €44.36
Electivire 121 — €30.45
Alakazam 2 — €24.44

Set value over 10 weeks · same 119 cards each week
Week	Set value
2026-W31	€343.84
2026-W32	€343.12
2026-W33	€343.75
2026-W34	€366.58
2026-W35	€366.63
2026-W36	€384.02
2026-W37	€386.60
2026-W38	€390.99
2026-W39	€393.93
2026-W40	€393.93