Came up in a game yesterday:

Ageless Crone is committed as a defender to a conflict in which Yoshi is participating. Yoshi discards the favour. How much do events cost? One less? Two less to a minimum of zero, then plus one?

Does this change if Yoshi uses his ability, and then the Crone is played directly into the conflict?

Cheers

Modifiers are calculated simultaneously, regardless of the order of play (baring modifiers to base or printed values). Yoshi and Crone both in play would be a net effect of 1 less Fate cost for the events for the Crane player.

Kakita Yoshi

Action: While this character is participating in a conflict, discard the Imperial Favor – draw 3 cards. Reduce the cost of each event you play during this conflict by 2.

Agless Crone

During a conflict in which this character is participating, increase the cost for each player to play each event by 1.

RR - Modifiers

The calculation of a value treats all modifiers as being
applied simultaneously. However while performing the
calculation, all additive and subtractive modifiers should
be calculated before doubling and/or halving modifiers are
calculated.

Yoshis ability is no event. so no cost raise.

3 minutes ago, Vendettar said:

Yoshis ability is no event. so no cost raise.

Yes, but Yoshi's ability causes events played to have a reduced cost by two. The Crone increases the cost of events by one. So the net result is that all events played by the Crane player after Yoshi's ability is used have their cost reduced by one.

Its +1 and -2 then to a minimum of 0, so for the player with Yoshi their events are total -1 cost.