Last Battlefield

{t}: Add one mana of any color. Activate only while
Last Battlefield is a land.

As long as Last Battlefield is your active plane,
whenever a phyrexian enters the battlefield under a
player's control, put a +1/+1 counter onto a creature
you control.

As the sounds of war ceased, the conflict against
Phyrexia came to an end. The finale was in the tentacles of the eldrazi titans now.