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.

Megalith Phul · Rise of the Duelist Premiere! promotional card 78990927/1

Megalith Phul (Rise of the Duelist Premiere! promotional card 78990927/1), Common. Market price $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket, not guaranteed values.

You can Ritual Summon this card with a "Megalith" card. If this card is Ritual Summoned: You can target 1 Ritual Monster in your GY; this card's Level becomes the Level of that target, then add that target to your hand. During the Main Phase (Quick Effect): You can activate this effect; Ritual Summon 1 "Megalith" Ritual Monster from your hand or Deck by Tributing monsters from your hand or field whose total Levels equal or exceed the Level of the Ritual Monster. You can only use each effect of "Megalith Phul" once per turn.

Weekly price history

Week	Market price
2026-W31	$0.12
2026-W32	$0.12
2026-W33	$0.12
2026-W34	$0.12
2026-W35	$0.12
2026-W36	$0.13
2026-W37	$0.13
2026-W38	$0.13
2026-W39	$0.13

Questions

How much is Megalith Phul 78990927/1 worth?

Megalith Phul from Rise of the Duelist Premiere! promotional card (78990927/1) has a market estimate of $0.13, unchanged this week. Prices are estimates from TCGPlayer and Cardmarket.

Is Megalith Phul 78990927/1 rare?

It is a Common from Rise of the Duelist Premiere! promotional card, a 1-card set.

Browse more Yu-Gi-Oh cards · All Rise of the Duelist Premiere! promotional card cards · Build a deck · Track your collection