(Speed) You Are Needed: Harbinger can use Phasing/Teleport. Give Harbinger a power action and choose a friendly character that is 6 or fewer squares from her. Put the chose character in the square occupied by Harbinger, and then put Harbinger in the square occupied by the chosen character; then deal Harbinger 1 unavoidable damage.
(Damage) Crosstime Heralds: Harbinger has the Duo attack symbol
any cool tricks you got with her?
only thing i can think of is swapping places with double based figs or giants to give them a sort of move and attack.