one piece flanked by legends booster box OP-06 English Hiriluk from the Drum Kingdom Arc One Piece Flanked by Legends

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

The Neutrinos + Aurelia, the Warleader for infinite combats)

Its a bit unique how it works since it activates from the graveyard, but that makes it a very difficult sac outlet to interact with

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)

Whenever this creature enters, put a +1/+1 counter on target creature