7000 doesnt sound like it would cut it Theres roughly 140 different English Pikachu cards if youre talking actual variants
Even if you leave the Charizards and take away the duplicates of the others, then there wouldve been enough space to have 6 cards for the megas that were never printed
That's why I recommend AncestralMTG
He actually has this, like, mechanism where he gets too stressed, he kind of explodes, and it affects everyone around him, and I feel, like, very relatable
While it is expensive and somewhat slow, if you can untap with it on the battlefield and a grip full of cycling cards, the game should quickly get out of hand, despite the randomness inherent in Unpredictable Cyclone
Still, you will have eliminated the additional six mana required to cast it