Cassian, General of Armies

Vigilance, Lifelink, Flying
When Cassian enters the battlefield put a +1/+1 counter on target creature you control. If that creature is an Illyrian put two counters on instead.
If Azzriel and Rhysand are on the battlefield with Cassian he gains +2/+2.
If Nesta Archeron is on the battlefield Cassian gains +1/+1.