yugioh mausoleum of the emperor deck (Platinum Secret Rare) [RA03-EN167] Platinum Ive just read the errata

You can sort by banned, limited and forbidden cards, as well as switch between different card pools, such as TCG, OCG and Rush

"Tournament Fatigue" is the result of all of your mental energy being focused entirely on winning children's card games, round after round, in a gauntlet of terror and suffering

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- 46% | 1.83 (Was 39%) Loading

Labrynth cards can destroy monsters, spell cards, and trap cards before the opponent gets the chance to use them

Bottom line, Solid isnt a BAD card, per se, but considering he shares UR materials with the other normal summons of the deck, Stratos and Vyon, which are strictly better than Solid, in my opinion skip him and dont waste your materials