Tromell, Seymour's Butler{2}{G}
Legendary Creature — Elf Advisor
Each other nontoken creature you control enters with an additional +1/+1 counter on it.
{1},{T}: Proliferate X times, where X is the number of nontoken creatures you control that entered this turn. (To proliferate, choose any number of permanents and/or players, then give each another counter of each kind already there.)
2/3
Artista: Kotetsu Kinoshita