Cr Si?

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TheRanger
TheRanger
Wilds Pathfinder
#1
What does the "SI" stand for? I know that CR means Chest Run, and always thought SI stood for Imperial Sanctum, but the letters are switched.
Dr Strangelove
Dr Strangelove
Furnace Stoker
#2
I think it stands for "self invite"
I
Illidan Coldage
Frost Gate Guardian
#3
CR SI = Chest Run Self Invite
milias
milias
Grotto Attendant
#4
Good info, I didn't know this either. When I first saw "Cr Si", I was thinking of the period table

Chromium Sulfide?