Name things Shiki can't kill.
Shiki can kill everything, there is no exception
fate shirou vs shiki
ubw shirou vs shiki
hf shirou vs shiki
The bar is a single incident, whereas the glad one can be exposed to at any time.
There's also the fact that we know Ciel met Shirou at one point in Archer's timeline but they didn't hook up.
How to Nasuverse, in descending order:
Read Tsukihime (all routes, obviously)
Read Tsukihime Plus-Disc
Read Kagetsu Tohya
Read/Play Melty Blood
Read Fate/stay night (all routes, obviously. Fate > UBW > HF is the preferred order)
-- from here onwards you may watch the Fate/sn UBW anime at any time
Read Fate/hollow ataraxia (obviously everything)
Read Fate/Zero (the LN, you dumbfuck)
--- from here onwards you may watch the F/Z anime, and play Fate/EXTRA at any time
Read Kara no Kyoukai until Vol4 (as far as it's translated. Yes, the LN, you fucking bookphobic american)
--- from here onwards you can Kara no Kyoukai movies
Play Battle Moon Wars
--- from here onwards you are allowed to partake in the discussion in powerlevel threads
Play Fate/EXTRA CCC and Read Mahoutsukai no Yoru, in no specific order
Reread everything previously read in superior nihongo
This is objectively, subjectively and unquestionably the true answer.
Kagetsu Tohya was my personal favorite, it's got a great blend of fun, mystery and horror in a very dream-like, surreal setting.
I've heard Extra CCC was the greatest from a few people, but translation never.
Shiki goes to attack Touma
Traces Imagine Breaker
Shiki needs to drop his knife, backs away
Touma goes on the offensive
With a mighty roar, Touma charges for Shiki
Touma trips on his shoelaces
Touma lands face first onto Shiki's knife
Say, Shiki chosen as 5th HGW as caster servant.
Then Medea buff him and he still possess MEoDP.
How many day the war will end ?
Will shirou get fucked by him ?
To elaborate, Shiki can see the lines of death. Roa could see lines that killed life. THEREFORE BY INFERENCE, Shiki can only kill death. Things just happen to die or stop existing afterwards. SO TECHNICALLY he can hardly kill shit. He's using a fucking paring knife.