The other may exclude you from the playgroup moving forward
At the beginning of your second main phase, you draw X cards and lose X life, where X is the number of your opponents who were dealt combat damage by Estinien Varlineau or a Dragon this turn
If you remember from the early days of Pokmon, Giovani does use Nidoking in battle against Red, so theres certainly some nostalgia here
I truly wonder what the secondary market price of this card might be like assuming whoever finds it would be willing to part with it
This only works with Swamps, but if you have a card like Urborg, Tomb of Yawgmoth, which turns all your lands (and your opponents lands) into Swamps, you have a ton of mana at your fingertips
Its like the ultimate Solemn Simulacrum, and only color identity will prevent it from becoming a fairly ubiquitous card in that format