Dwarf Soldier

Unit (This creature can be in a unit. A unit contains at least two of up to one Frontline, up to one Rank and up to one Support. Creatures in a unit count as in formation. Whenever a creature with the Frontline, Rank or Support subtype enters the battlefield it may enter as part of a unit. At the beginning of your upkeep you may have each creature with this ability join a unit or have each pair of two creatures with this ability swap units.)
In formation, Dwarf Soldier gets +2/+1.