Hey everyone.
The following method will allow you to get two deathrunes up and ready to use within one global-cooldown using two abilities: Blood strike and Blood tap.
The blood tap's normal function is that it converts one bloodrune into a deathrune - and activates it (removes the rune cooldown - if it have any).
Unlike blood tap, the blood strike just converts a bloodrune into a deathrune - with cooldown.
So here's the deal;
If you use blood strike to convert one bloodrune into a deathrune and then use bloodtap - it will convert the second bloodrune into a deathrune but activate BOTH deathrunes instead of only one!
This is good because you can basically -if you are in a pinch- use this method to instantly get two death runes -without CDs- so that you can throw a second deathstrike or a second scourge strike without having to wait for rune cooldowns!
The following is my "inb4 repost defense" - don't read if you don't care!
While writing this I searched for "Reaping" as I naturally assumed that any related thread would use this word since it's the talent needed. I found these two semi-related threads.
perma-death-rune-dks
and one of it's reposts
one-free-death-rune-while-unholy-dks
However - these are not the same as mine BUT still works occasionally.