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.

Constellar Sombre · Lord of the Tachyon Galaxy Sneak Peek Participation Card 78358521/1

Constellar Sombre (Lord of the Tachyon Galaxy Sneak Peek Participation Card 78358521/1), Super Rare. Market price $8.32, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

You can only use each effect of "Constellar Sombre" once per turn. While this card is in the Graveyard, if it was sent there this turn, you can Normal Summon 1 "Constellar" monster for 1 less Tribute. You can banish 1 "Constellar" monster from your Graveyard, then target 1 "Constellar" monster in your Graveyard; add that target to your hand, also, this card gains the following effect. ● This turn: You can activate this effect; Normal Summon 1 "Constellar" monster.

Weekly price history

Week	Market price
2026-W31	$8.58
2026-W32	$8.85
2026-W33	$8.85
2026-W34	$9.17
2026-W35	$9.17
2026-W36	$9.17
2026-W37	$9.17
2026-W38	$8.32
2026-W39	$8.32

Questions

How much is Constellar Sombre 78358521/1 worth?

Constellar Sombre from Lord of the Tachyon Galaxy Sneak Peek Participation Card (78358521/1) has a market estimate of $8.32, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Constellar Sombre 78358521/1 rare?

It is a Super Rare from Lord of the Tachyon Galaxy Sneak Peek Participation Card, a 1-card set.

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