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.

Mantis Engine · Tenth Edition 333★/510

Mantis Engine (Tenth Edition 333★/510), Uncommon, Artifact Creature — Insect. Market price €0.44, unchanged this week, relatively stable over the last 11 weeks. Illustrated by John Zeleznik. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

First printed in Urza's Destiny on 7 June 1999.

More Mantis Engine printings

Mantis Engine · Tenth Edition — €0.14
Mantis Engine · Urza's Destiny — €0.18

Weekly price history

Over the last 11 weeks it has sold for between €0.44 and €0.44. That is where it was 10 weeks ago, at €0.44.

Week	Market price
2026-W31	€0.44
2026-W32	€0.44
2026-W33	€0.44
2026-W34	€0.44
2026-W35	€0.44
2026-W36	€0.44
2026-W37	€0.44
2026-W38	€0.44
2026-W39	€0.44
2026-W40	€0.44
2026-W41	€0.44

Price in context

Mantis Engine ranks #202 of the 508 priced cards in Tenth Edition. The median Uncommon in the set is €0.28. The 508 priced cards in Tenth Edition are worth €1249.55 together; this card is less than 0.1% of that. The set’s value is up 2.6% this week. Over the last 11 weeks the set’s value went from €1119.20 to €1167.21 (+4.3%).

Top chases in Tenth Edition

Time Stop 117★ — €61.22
Goblin King 207★ — €60.14
Shivan Dragon 230★ — €50.46
Elvish Champion 261★ — €49.44
Birds of Paradise 252★ — €34.77

Set value over 11 weeks · same 489 cards each week
Week	Set value
2026-W31	€1119.20
2026-W32	€1093.42
2026-W33	€1099.37
2026-W34	€1083.31
2026-W35	€1063.72
2026-W36	€1076.16
2026-W37	€1077.31
2026-W38	€1100.45
2026-W39	€1122.63
2026-W40	€1136.43
2026-W41	€1167.21