No. Chain Burst has to already have resolved and be active, before a trap card's activation for it to deal any damage.
If a player activates a trap and Chain Burst is chained to it, because Chain Burst wasn't active during that card's activation, no damage is dealt. It doesn't matter that it's active while that trap resolves, it has to be active during both activation and resolution.
Similarly it can't 'see' its own activation. Since it wasn't active during its own activation, it deals no damage on its own resolution.
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its in the elevator, you have to open a door (750), clear the debris in front of it (1000) then you can use it by activating the switch for 250 points for a trip.
I run a very good dragon deck and the only equip card I run is Axe of Despair. 1000 attack.
Forbidden Chalice will negate Marshamallon's 'cannot be destroyed by battle' effect. Because Forbidden Chalice changes the ATK of a monster, it can be used in the Damage Step, after Marshmallon is flipped by an attack. If you did this, you will not take the 1000 damage from Marshmallon either - his damage dealing effect activates after Damage Calculation, but will be negated.
You sell it and then you will get 1000 $ for it.
you jump 1000 times