The GK fluff saysDraigo carved his predecessors name into Mortarion's heart- what it doesn't say is how many Grey Knights it took to bring down the Daemon Primarch, it certainly doesn't say that Draigo did it alone.
We know that Mortals can walk the realm of Chaos without using a Geller field, it says as much in the Chaos Daemon Codex with mortal champions having to quest across Khorne's realm in order to secure themselves a Juggernaught or Slaanesh's realm to gain a Seeker etc. Chaos Space Marines, especially the Word Bearers, don't always sail the empyrean with their Geller fields activated either.
If you don't oppose chaos you are free to walk the Realms, as the daemons probably take little interest in you. I don't believe that's the case with Draigo.
It would be sad If we had to take things that are reserved for other parts of 40k to explain cases disaster cases like Draigo! - Geller Fields - They're HUGE and for large Imperial vessels, smaller ships can't travel in the warp because they can't accomodate room for a warp engine + geller fields.
So this guy just happens to lug around a personal Geller Field (Something I don't think CAN exist), just in case he'd get pulled into the warp?
This fluff just ruins so many other fine aspects of 40k...
Now what about Eldar Warp Spiders who are described as insane enough to visit the Warp for split-seconds at a time and every time they risk the wrath of the daemonic inhabitants living there.
Everything would be fine if they just made Draigo an ambigous side story like other farcry stuff.
This guy shouldn't be put on the FREAKING tabletop, makes his fluff 100% accurate and true.
OT: My 100th post