10 cards where the cards can be your commander and the number of identity colors is 4

A-Omnath, Locus of Creation (Zendikar Rising #A-232)
Aragorn, the Uniter (The Lord of the Rings: Tales of Middle-earth #192)
Atraxa, Grand Unifier (Phyrexia: All Will Be One #196)
Atraxa, Praetors' Voice (Double Masters #190)
Breya, Etherium Shaper (Double Masters #192)
Kynaios and Tiro of Meletis (Commander 2016 #36)
Omnath, Locus of Creation (Zendikar Rising #232)
Saskia the Unyielding (Commander 2016 #41)
The Fourteenth Doctor (Secret Lair Drop #1583)
Yidris, Maelstrom Wielder (Commander 2016 #50)

This search is finished. Now the real work can begin.