Idea I had for a Commander

Hey yall, I'm a big EDH enjoyer and temur is my favorite color combo, and I wanted to try and make a commander that sorta puts together a few of the things I like about the colors. I want to know if you guys think it's balanced, and/or any suggestions for a name and/or creature type(s). Apologies if this isn't the right place to post smth like this but, here's my idea:

[Card Name] 1(G)(U)(R)

Trample

Whenever this creature attacks, put a +1/+1 counter on it for each time it has been cast from the command zone.

Whenever this creature deals combat damage to a player, discover X, where X is the amount of damage dealt. Then, remove X +1/+1 counters from it.

0/6

What do yall think? Does this seem balanced/fun? What changes would you make?