Lemenir, Inspirer of Names

Flying, mentor (Whenever this creature attacks, put
a +1/+1 counter on target attacking creature with
lesser power.)
When Lemenir, Inspirer of Names, enters the battlefield and you control a Ranger, Rogue,
Warrior, and Wizard, those creatures gain
Dragon in addition to their creature types and
"At the beginning of your upkeep, roll a six-sided
die. When you do, put X +1/+1 counters on this creature, where X is the result."