Mages is reading a mage book. Hm.

when suddenly...he begins to glow greenish. something is draining him...or starting to

A green tendril of light keeps sucking from him...he's doubling over

he's really drained now..and developing...holes? getting pale...more green! lifebar low

It's just the green tendril of light in this panel...where does it lead?

...look further

...it's the warlock! casting drain life rather casually

"WHAT ARE YOU DOING?!" --mage

"I have a big day ahead of me", shrugs warlock