The wording of the rules (RAW) is that you can't take magic items.
Magic items aren't mentioned anywhere, its the armybook that gives
The Blood Angels steel themselves against the oncoming Tyranid assault. No prisoners will be taken this day!
VIDEO = https://www.youtube.com/watch?v=hClLOpPyEnQ
The skies broil and crack under the might of the tyranid warmachine as it roars into the sinister and arcane fury of Necron weaponry!