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?

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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.

Hollow Dogs · Ninth Edition 139★/710

Hollow Dogs (Ninth Edition 139★/710), Common, Creature — Phyrexian Zombie Dog. Market price €0.42, up 1.5% this week, relatively stable over the last 11 weeks. Illustrated by Jeff Miracola. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

First printed in Urza's Saga on 12 October 1998.

More Hollow Dogs printings

Weekly price history

Over the last 11 weeks it has sold for between €0.41 and €0.44. That is down 4.4% from €0.44 10 weeks ago.

Week	Market price
2026-W31	€0.44
2026-W32	€0.43
2026-W33	€0.43
2026-W34	€0.43
2026-W35	€0.43
2026-W36	€0.43
2026-W37	€0.43
2026-W38	€0.41
2026-W39	€0.41
2026-W40	€0.41
2026-W41	€0.42

Price in context

Hollow Dogs ranks #372 of the 694 priced cards in Ninth Edition. The median Common in the set is €0.31. The 694 priced cards in Ninth Edition are worth €2900.64 together; this card is less than 0.1% of that. The set’s value is up 1.6% this week. Over the last 11 weeks the set’s value went from €2544.72 to €2796.91 (+9.9%).

Top chases in Ninth Edition

Fellwar Stone 297★ — €184.53
Biorhythm 231★ — €85.92
Grave Pact 135★ — €80.33
Seething Song 216★ — €79.13
Underground River 326★ — €71.39

Set value over 11 weeks · same 635 cards each week
Week	Set value
2026-W31	€2544.72
2026-W32	€2565.52
2026-W33	€2535.92
2026-W34	€2565.00
2026-W35	€2554.66
2026-W36	€2575.97
2026-W37	€2623.59
2026-W38	€2670.77
2026-W39	€2673.97
2026-W40	€2751.85
2026-W41	€2796.91