Barring
FAQ it's all following movement phases.
edit: and now I see why people are talking about exponential Kritza's! By strict
RAW, Kritza 1 dies turn 1, turn 2 you bring him back. Turn 2 Kritza 2 dies. Now on turn 3 you roll for Kritza 1, who is slain, and Kritza 2, who is also slain, and now you get Kritza 3 and Kritza 4 (if you roll 4+ both times).
Kritza 3 dies, Kritza 4 survives... next turn you roll for Kritza 1, Kritza 2, AND Kritza 3!
Phew. Obviously not
RAW. Presumably it's meant for 1 Kritza to eventually come back, but not infinite Kritzas... multiplying... like rats? Maybe it is intentional?