Dex, Quandrix All Star

Magecraft — Whenever you cast or copy an
instant or sorcery spell, create a 0/0 green and
blue Fractal creature token. Put X +1/+1
counters on it, where X is the number of instant
and sorcery spells you've cast this turn.
{4}{g}{u}: Put a +1/+1 counter on each Fractal you control.
"One of the most brilliant students in all of
Strixhaven."