Seriously its hilarious how many people don't actually research about something before actually trying it. Reminds me of the weird IT calls of them bricking their devices when it came with a manual.
RTFM
EndlessSorcerer2 votesI don't really understand why so many people had issues comprehending how it worked. The behavior seems pretty intuitive:
Therefore, it logically follows that renting a shard will consume it like every other action you could make.
ShinkoMinori1 votesIt was really obvious to me at the first time, but it was even more simple to google "hextech crafting" and just read the post.