So, as my group is coming close to finally encountering Cirothe in EN Publishings "How to slay a dragon" (or rather "Holdenshire Chronicles", I want to make sure I understand how an adult red dragon works in 5e.

Going by what D&D Beyond shows, am I right in thinking that this is a possible series of actions?

* Round 1
-- At ini count 20, ARD uses a lair action (say, magma eruption)
-- At his own ini, ARD uses multiattack to strick with Frightful Presence, 1 bite, 2 claws
-- At the end of the 1st characters turn, ARD uses Tail attack
-- At the end of the 2nd characters turn, ARD uses Wing attack (no more Legendary Actions this round)

* Round 2
-- At ini count 20, ARD uses a lair different action (say, tremor)
-- At his own ini, ARD uses multiattack to strick with Frightful Presence, 1 bite, 2 claws
-- At the end of the 1st characters turn, ARD uses Tail attack
-- At the end of the 2nd characters turn, ARD uses Wing attack (no more Legendary Actions this round)

* Round 3
-- At ini count 20, ARD uses a different lair action (say, magma eruption again, or volcanic gas)
-- At his own ini, ARD uses multiattack to strick with Frightful Presence, 1 bite, 2 claws
-- At the end of the 1st characters turn, ARD uses Tail attack
-- At the end of the 2nd characters turn, ARD uses Wing attack (no more Legendary Actions this round)

Is this how a dragon would work? I mean, I know we're talking CR17 here, but, all things considered, that's pretty heavy stuff.

Or did I do / get something wrong?

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