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.

Siren's Call · Fourth Edition Foreign Black Border 101/378

Siren's Call (Fourth Edition Foreign Black Border 101/378), Uncommon, Instant. Market price €0.60, unchanged this week. Illustrated by Anson Maddocks. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Weekly price history

Week	Market price
2026-W31	€0.64
2026-W32	€0.61
2026-W33	€0.61
2026-W34	€0.58
2026-W35	€0.58
2026-W36	€0.59
2026-W37	€0.59
2026-W38	€0.60
2026-W39	€0.60

Questions

How much is Siren's Call 101/378 worth?

Siren's Call from Fourth Edition Foreign Black Border (101/378) has a market estimate of €0.60, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Siren's Call 101/378 rare?

It is an Uncommon from Fourth Edition Foreign Black Border, a 378-card set.

Browse more Magic: The Gathering cards · All Fourth Edition Foreign Black Border cards · Build a deck · Track your collection