opponent did a abyssteus play
abyssteus is chain link 1, dragoons is chain link 2
i let chain link 2 resolve can i negate abyssteus?
No, cards that negate activations need to chain directly to the effect that is being negated.
Similar ruling with Stardust.
If you activate Majespecter Tempest, you will be negating Dragoons, not Abyssteus.
Also, you cannot use cards or effects while a chain is currently resolving, unless a card or effect says so. (This is not mandatory effects such as Dandylion, as those will activate in a new chain. An example is a card like Vilespawn Archfiend, an effect that applies while resolving an effect.)