Clarifications on Blood Weakens and Infernal Pursuit

Bloodartist wrote:

Ankha wrote:

See rulebook: cards that are not replaced count against the handsize.

This was the critical info. Thank you.

However, Id like to point out that since IP does affect taste of vitae and thus the cards you draw are replacement cards,

The extra card drawn with IP is not a replacement card. Replacement cards are drawn when the condition to replace them is met. Until then, cards waiting to be replaced count against your hand size.
Let's say you've played 2 cards that are not replaced yet. You have 5 cards in hand, and 2 "slots" are taken by the cards not replaced yet.
You play Taste of Vitae. You are down to 4 cards, replace it => back to 5, then you draw an extra card from IP. You have 6 cards in hands, which is too much since you still have those 2 cards waiting to be replaced. You have to discard down to 5 cards so that you're back to your hand size.

Bloodartist wrote:

these cards would increase the functional handsize. The new handsize by this ruling would be 6 (both cards are replacement cards so they increase the handsize) and there still wouldn't be any discards. After playing taste of vitae the new handsize is 6 and IP itself does not force you to discard.

No, see above.