one piece flanked by legends booster box OP-06 English blue Marco BANDAI ONE PIECE Card Game

The Neutrinos + Aurelia, the Warleader for infinite combats)

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Individually these effects are marginal: but combined they form a card that was so good, many non-red blue base decks started playing red just to get it (plus Flametongue Kavu, to be perfectly fair)

Chandra quickly becomes a win condition when ignored

As far as dealing with things you care about, it is not too far off a Counterspell on wings

In Commander, its very much possible to stack up multiple emblems by replaying Sephiroth from the command zone, and once youre at that point, the games probably over