Wandertale Mentor (BLB)

Card Text

Whenever you expend 4, put a +1/+1 counter on this creature. (You expend 4 as you spend your fourth total mana to cast spells during a turn.)
{T}: Add {R} or {G}.

flavour Text

“You’ve all grown so much since I passed through this burrow last! Let’s see, where to begin this story?”