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.

Hippowdon · Majestic Dawn 21/100

Hippowdon (Majestic Dawn 21/100), Rare, Stage1, 100 HP. Market price €0.76, unchanged this week. Illustrated by Kent Kanetsuna. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Its huge mouth is almost seven feet across. It has enough power to completely crush a car.

Card text

Vacuum Sand 20 — Search your discard pile for a Fighting Energy card and attach it to Hippowdon.
Sand Impact 50+ — Flip a coin for each Fighting Energy attached to Hippowdon. This attack does 50 damage plus 20 more damage for each heads.

Weekly price history

Week	Market price
2026-W31	€0.76
2026-W32	€0.71
2026-W33	€0.73
2026-W34	€0.76
2026-W35	€0.76
2026-W36	€0.78
2026-W37	€0.76
2026-W38	€0.76
2026-W39	€0.76

Printings & variants

Normal — $1.97
Reverse Holo — $3.00

Questions

How much is Hippowdon 21/100 worth?

Hippowdon from Majestic Dawn (21/100) has a market estimate of €0.76, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Hippowdon 21/100 rare?

It is a Rare from Majestic Dawn, a 100-card set.

Is Hippowdon 21/100 tournament legal?

Hippowdon 21/100 has rotated out of the current formats.

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