Options You want as many options for the parts of a card as you can get
For example, if there are two +1/+1 counters on Aerith Gainsborough and it gets three -1/-1 counters, you'll put two +1/+1 counters on each legendary creature you control when Aerith Gainsborough's third ability resolves.
You can obtain the Gholdengo (3-Diamonds rarity) card by opening Shining Revelry from Shining Revelry set
Overpowering Attack will be great at three mana, but its also perfectly fine for five mana in decks that care about extra attacks
With 100 HP to start with, this means it'll probably get one massive hit in and then get KO'd immediately after, and not even two Potions will allow it to survive using Beat Punk twice
Its first move, Supportive Singing, is able to heal a large amount of damage from any benched Pokmon of the player's choosing