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.

Groudon EX · XY Black Star Promos XY42/211

Groudon EX (XY Black Star Promos XY42/211), Promo, 180 HP. Market price €37.70, unchanged this week, relatively stable over the last 10 weeks. Illustrated by Eske Yoshinob. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

Groudon (National Pokédex #383) first appeared in Pokémon Ruby and Sapphire (2002). Its earliest English cards in our catalogue are from 2003: Nintendo Black Star Promos.

More Groudon EX printings

Groudon EX · Primal Clash — €1.43
Groudon EX · Primal Clash — €15.76

Card text

Rip Claw 30 — Flip a coin. If heads, discard an Energy attached to your opponent's Active Pokémon.
Massive Rend 130

Weekly price history

Week	Market price
2026-W31	€37.70
2026-W32	€37.70
2026-W33	€37.70
2026-W34	€37.70
2026-W35	€37.70
2026-W36	€37.70
2026-W37	€37.70
2026-W38	€37.70
2026-W39	€37.70
2026-W40	€37.70

Price in context

Groudon EX ranks #45 of the 191 priced cards in XY Black Star Promos. The median Promo in the set is €14.93. The 191 priced cards in XY Black Star Promos are worth €25508.66 together; this card is 0.15% of that. The set’s value is unchanged this week. Over the last 10 weeks the set’s value went from €25536.76 to €25508.66 (-0.1%).

Top chases in XY Black Star Promos

Mewtwo XY101 — €4675.00
Mewtwo EX XY107 — €4675.00
Mewtwo EX XY125 — €4675.00
Mew XY192 — €4675.00
Greninja EX XY20 — €542.50

Set value over 10 weeks · same 191 cards each week
Week	Set value
2026-W31	€25536.76
2026-W32	€25624.51
2026-W33	€25613.97
2026-W34	€25668.95
2026-W35	€25671.90
2026-W36	€25701.88
2026-W37	€25460.42
2026-W38	€25481.23
2026-W39	€25508.66
2026-W40	€25508.66

Other Groudon EX cards

There are 2 other cards named Groudon EX across 1 set.

Primal Clash 150 (2015) · Ultra Rare — €1.43
Primal Clash 85 (2015) · Ultra Rare — €15.76

About the illustrator

Eske Yoshinob has illustrated 179 cards across 57 sets.

Mewtwo EX · XY Black Star Promos — €4675.00
Mew EX · XY Black Star Promos — €215.89
Hoopa EX · XY Black Star Promos — €125.61
Charizard EX · XY Black Star Promos — €107.06
Venusaur EX · XY Black Star Promos — €97.80
Gardevoir EX · Steam Siege — €92.65
Blastoise EX · XY Black Star Promos — €64.48
Gengar EX · Phantom Forces — €46.96
Rayquaza EX · 30th Classic Collection — €41.79
Meloetta-EX · Legendary Treasures — €29.89

More from XY Black Star Promos

← Previous card: Kyogre EX XY41 · Next card: Diancie EX XY43 →

This card in other languages: Français

Questions

How much is Groudon EX XY42/211 worth?

Groudon EX from XY Black Star Promos (XY42/211) has a market estimate of €37.70, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Groudon EX XY42/211 rare?

It is a Promo from XY Black Star Promos, a 211-card set.

Is Groudon EX XY42/211 tournament legal?

Groudon EX XY42/211 is legal in Expanded.

Browse more Pokémon cards · All XY Black Star Promos cards · Build a deck · Track your collection