I have a question about a scenario that I think I know the answer to but would appreciate confirmation from those more involved in the rules than me.

The scenario involves a guarding creature capable of a push effect with its counterattack, a flying creature making the attack, and a wall with the passage attacks trait. For clarity, we can use the [mwcard=psc23]Shoalsdeep Tidecaller[/mwcard] guarding, the [mwcard=PSC06]Crusader Griffin[/mwcard] attacking, and a [mwcard=PSW01]Coral Barrier[/mwcard] as the wall.

The question is if during the counterstrike step the Tidecaller makes the push effect, could it push the attacking Griffin through the Coral Barrier, triggering the passage attack?

I think the answer is yes but please correct me if I am wrong. My reasoning is since the Griffin is attacking a non-flying creature, it lost the flying trait for the duration of the attack. Unless I am mistaken, the push effect, and the passage attack of the Coral Barrier, is resolved during the attack (specifically the counterstrike step), and thus before the Griffin regains the flying trait.

Is my interpretation correct?

This seems like a question of when/how often a check is made for mandatory actions. It is agreed that when the griffin is activated, the mandatory actions for Chant of Hate is checked and the griffin must move one zone closer. The question to me is after moving one zone, are the mandatory actions for Chant of Hate checked again? If yes and movement is still uninhibited, then the griffin must move again, (and following this logic, if uninhibited, attack the mandatory target). If there is not a check after the first movement, then Zuberi would be correct and griffin has the option to stop and take other actions. However, even in that ruling I do not think it makes sense for the griffin to have the option of taking a second move action to a zone that does not move it closer. It would be able to wait or attack another creature in that middle zone, ect.

Given that after the first movement action there is a check for things like hindrance and zone enchantments triggering, I favor there also being a check for Chant of Hate and thus agree with ClockWork. But maybe that is not the correct way of thinking of mandatory actions.