Glethos, the Peacemaker

At the beginning of your opponent's upkeep, that opponent chooses a creature they control, then
that creature fights target creature you control.
As long as it's your opponent's turn, birds you
control get +4/+0.
"If war is what you wish, such will not be fulfilled. Retribution, however, in my eyes, is the key to true
peace of mind" -Glethos, conversing with Agrasa, the Warlord.