Yugioh the abridged series, often shortened to Ygotas, its pretty much the original abridged series.
The first couple of episodes arent exactly great, but littlekuriboh (the guys who made it and does all the voices) gets a lot better at doing voices and editing after episdoe 8-9.
Having just one spell left to cast is the same kind of magic mechanics that is in baldurs gate (and probably DnD)
You refresh your available spells by resting for half a day. No mana costs. It's just X amount of level 1, 2, 3 4 and so on spells you can cast in a day.
The show's a lot better at this point, when they actually follow the rules of the card game a bit more. In the early episodes they were clearly just making **** up.