Ple-Sen
Nekoran deprived Krabby of actions, who wasn't particularly active in the game and might not have had any actions at all.
Yes, that's true, the move is indeed rather strange. It can only be justified by the fact that a quiet, inactive player has much less chance of encountering a talisman than active players, i.e., Krabby is a relatively safe option.
instead of raising a minion
Before the start of the second day, one of the roles being considered for Ney was Piona, which Nekoran is simply unable to raise as a minion. Furthermore, as long as Theodore is alive (all of whose functions are aimed at neutralizing Neko-neko), they essentially cancel each other's actions in the sense that on the next night, Theodore goes to perform an exorcism, and Nekoran simply skips the night without achieving any results. Black magic seems like a more significant and disruptive option, even if there is a chance of encountering a talisman.