Whispers of Phyrexia

When a creature permanent with a "Compleation" counter enters the battlefield under your opponents control, you
may pay {5} and take control of that permanent.
Reduce the cost of this ability by {1} for every legendary Phyrexian permanent you control.
"I hear them, the Chorus, The Flutes,
The Drums. I- I know. All will be One." -Unknown.