Top 5 Yu-Gi-Oh: Soul Fusion Cards 5
It enters the battlefield with +1/+1 counters equal to the amount of mana used to cast it
(The phases are, in reverse order, ending, second main, combat, first main, and beginning.) As long as there are more than two players in the game, the turn order is reversed
Tickets and more info can be found on the profile.
Despite the massive popularity of Gen 1 Starter Venusaur (which is definitely not one of Pokmon Red and Blue's weirdest Pokdex entries), the reverse firework variant of the Kanto Grass-type isn't actually worth that much
As you can see from the chart above, Duskmourn previews began cropping up as early as the first week of September, with the debut taking place on August 31