the chronicle states it.
sargeras was also described as having volcanoes on his back.
aman'thul ripping y'shaarj out of azeroth like a bug.
most titan artwork is pretty outdated, and the only 2 pics from vol.1 where a titan isnt portrayed planet sized are the 2 of sargeras' avatar.
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you dont deserve an answer, just for using that abomination of an outdated wikipage.