Declaration of War

Choose a colour, creatures you control gain
+1/+0 and lifelink when in combat with a creature of the chosen colour until end of turn.
Until end of turn, if a creature you control dies in combat from a creature of the chosen colour, gain
1 life for each creature put into the graveyard this way.
"Let the rivers run and ground soak their feet red with the blood of their kin! Give me your sword and I shall being prosperity!"