Add Firebending, and you can even double-cast spells by flashing it back
That doesn't stop Toxrill, the Corrosive from being a very versatile commander even in competitive settings, a very popular 99er, and able to make some forays into Pioneer and Standard
Pikachu has two attacks it can use, Charge and Thunderbolt
Finally, for optimal protection of your new cards, consider using accessories dedicated to One Piece
The decision to exclude promo Pikachu from the set was probably taken in the last minute when WotC decided to release the card as part of their promotion for the Pokmon League instead, and some made it into packs and boxes before the production process could be adjusted to remove these cards after cutting
Its no secret that I love spells way more than creatures, and the fact that its an instant has led to some pretty amazing mid-combat blowouts