Like Creature types, the Lesson subtype doesn't have any effect on the mechanics of the card but instead allows other cards to refer to and interact with them specifically
Guff Rewrites History gives them spells to cast
The legs in question are thick, and able to wrestle an 8/8 Octopus into submission
Id argue that all three spells fail to balance risk/reward spectrum in different ways, some more dramatically than others
If you do, return up to two Rat creature cards from your graveyard to your hand
Three of these cards were illustrated by 5ban Graphics who have illustrated many Full Art Trainer and Pokmon cards from the Black & White, XY, Sun & Moon, Sword & Shield, and Scarlet & Violet TCG series