While casting spells without spending mana is great, Nashi can burn you out really fast
This card is pretty easy to set up too, since it can Special Summon itself from your hand to a column with no cards in it, albeit only once per turn this way
(1) Add to your hand, or place in your Field Zone face-up, 1 Malefic World from your Deck or GY, then Special Summon 1 Malefic monster from your Deck or Extra Deck in Defense Position, ignoring its Summoning conditions, then, if your opponent controls a monster with 2500 or more ATK, all face-up monsters they currently control lose 2500 ATK until the end of this turn
Start here
The token often attacks as a 2/2 or 3/3, and later in the game, you get to build a spellslinger engine