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.

Guardian Slime · Legendary Duelists: Rage of Ra 15771991/57

Guardian Slime (Legendary Duelists: Rage of Ra 15771991/57), Ultra Rare. Market price $0.38, up 18.8% this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

If you take battle or effect damage: You can Special Summon this card from your hand. During damage calculation, if this card battles an opponent's monster (Quick Effect): You can make this card gain DEF equal to that opponent's monster's ATK during that damage calculation only. If this card is sent from the hand or field to the GY: You can add 1 Spell/Trap from your Deck to your hand that specifically lists the card "The Winged Dragon of Ra" in its text. You can only use each effect of "Guardian Slime" once per turn.

Weekly price history

Week	Market price
2026-W31	$16.81
2026-W32	$16.84
2026-W33	$16.24
2026-W34	$16.80
2026-W35	$16.80
2026-W36	$15.66
2026-W37	$0.43
2026-W38	$0.32
2026-W39	$0.38

Questions

How much is Guardian Slime 15771991/57 worth?

Guardian Slime from Legendary Duelists: Rage of Ra (15771991/57) has a market estimate of $0.38, up 18.8% this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Guardian Slime 15771991/57 rare?

It is an Ultra Rare from Legendary Duelists: Rage of Ra, a 57-card set.

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