Black doesn't quite destroy artifacts like Red or Green do, but does more wackier stuff like Artifact Possession , where this enchantment just 'corrupts' an artifact and deals damage to its owner any time it's used
Then Eiganjo Castle will ETB untapped and then taps with a White to prevent a pair of damage to our Commander or other legendary stuff, when our leader is a key combat damage win con that's great here
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Each pack has one silver screen foil card and it can be any card from the set, so it appears it can be any of the 534 cards, as the Innistrad: Double Feature card list has every nonbasic land card from each set on it
It's important to note also that this mana does not need to be used to cast spells
UW: Skies UB: Graveyard BR: Aggro RG: 4+ Power GW: +1/+1 Counters BW: Life gain UR: Spells BG: Morbid RW: Aggro UG: Ramp Each and every one of them is very easy for a new player to understand, while also conveying the flavor and mechanical themes of each color pair
