yugioh card that lets you attack first turn Skill Battle City Siren SBC1-ENS19 1st Edition Common Attack the Moon! | Yu-Gi-Oh!

And while it doesn't reach the eye watering values of the rest of the cards coming up on this list, at $130+, it's still a unbelievably good pull if you manage to score it

A WOTC employee that also judged on the Pro Tour and lots of local events had the idea that mini MTG cards would be such an awesome thing

2 Ultimate Tyranno Ultimate Tyranno is weaker than other monsters in the Tyranno group, but only by a few hundred Attack Points, although its DefensePpoints are very different

The answer is Pokmon cards, of course

But when the card was first released, it was initially only mildly popular

It is expensive at five mana