It's not a specific mechanic, but a great way to describe this play pattern, and is a much better slang term for describing the archetype than cards leaving the graveyard
You can also remove counters from artists, lands, and planeswalkers you control, so it isnt exclusively a creature-based effect
For 3 mana and 2 life you get to scry 2 and then draw 2
There are limits to the is:foil and is:nonfoil tags!) There are 58,779 foil prints total, including multiple foil types for cards, but how many of those are regular foils, especially when a card is reprinted multiple times and thus has multiple foil/nonfoil slots in Scryfall
Gyre Sage can put counters on itself and Druid can't, Gyre Sage is unbound by the number of counters it gets and therefore the amount of mana it can produce and Druid can only produce three mana
The artwork was illustrated by Hitoshi Ariga