yugioh flame swordsman cards Yu-Gi-Oh Card - DUOV-EN032 Only cards with this symbol can be used in Speed Duels Yu-Gi-Oh! Wiki - Fighting Flame

I find both of those to be upsides, honestly

add 1 "Power Bond" from your Deck to your hand, you can only use Dragon or Machine "Cyber" monsters as Fusion Material this turn, also once when you Fusion Summon this turn, you can also banish monster(s) from your GY as material

They do not affect your guaranteed Rare

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You could even tap Wall of Fortune itself this way on the turn it enters the battlefield