Thanks dane-m and Gendolkari and Donald X.!
I also don't want to continue the discussion, but feel the urge to explain that dane-m's last post is correct but incomplete. I'll try to close the discussion with a summary:
Yes, i saw
- move the top-three-looked-at cards into your hand
- move the top-three-looked-at cards onto your discard and draw
as two seperate, unrelated Catacombs'
effects.
The problem is, that was based on my personal instinctive-intuitive interpretation of the word "effect", since nowhere in the Stop-Moving rule (or anywhere else in the wiki) is the word defined or at least deducable (probably my personal inability). Through the discussion here topped of by Donald X. i learned
A set of instructions is its effect. A set of instructions keeps track where to it did move cards and although they may be unaccountable in a location (Gendolkari!), they are "known" and so are further movable.
(my interpretation, my wording!)
So Catacombs has not 2 effects (as listed above) but is 1 effect, which includes potentially multiple moves.