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.

Iron Boulder · Stellar Crown 071/142

Iron Boulder (Stellar Crown 071/142), Rare, Basic, 140 HP. Market price €0.06, up 20.0% this week. Illustrated by GIDORA. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Card text

Adjusted Horn 170 — If you don't have the same number of cards in your hand as your opponent, this attack does nothing.

Weekly price history

Week	Market price
2026-W31	€0.07
2026-W32	€0.08
2026-W33	€0.08
2026-W34	€0.06
2026-W35	€0.06
2026-W36	€0.05
2026-W37	€0.05
2026-W38	€0.05
2026-W39	€0.06

Printings & variants

Holo — $0.20
Reverse Holo — $0.25

Questions

How much is Iron Boulder 071/142 worth?

Iron Boulder from Stellar Crown (071/142) has a market estimate of €0.06, up 20.0% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Iron Boulder 071/142 rare?

It is a Rare from Stellar Crown, a 142-card set.

Is Iron Boulder 071/142 tournament legal?

Iron Boulder 071/142 is legal in Standard and Expanded.

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