Not only do topping Decks suffer, weaker Decks like Heraldics (at best they get a 2000 beatstick who is a RotA when he dies) and Scraps (can peak at 2500, but usually will hit 1900 instead, and the Synchro Monsters are one of the biggest parts of making the Deck work)
Lugia V from Silver Tempest is a beautiful and extremely sought after card
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That said, this commander wont do much else for you so this card may be better off in the 99 of a Sythis, Harvest's Hand deck
I have already written about how I crammed as many graveyard-matters mechanics as I could into an Olivia, Mobilized for War deck, but the deck never felt like it had the as-fan to read as a madness or flashback deck
Protect What Matters Every collection has cards worth protecting