caliber and ladd only have to pay both if they were chained wrong...
if its:
1: sangan
2: LaDD
3: DCK
Resolving:
3:DCK's eff vanishes since it isnt chained to sangan directly.
DCK's effect doesnt target, so the effect monster that will be negated by dck needs to be directly under it in the chain.
But dont forget DCK is still destroyed, since it gets tributed to activate its eff and activating and resolving are 2 different things
(the tribute is the cost of activating the eff)
2: ladd looses 500 atk/def and negates sangans eff
1: negated
the way without loosing both is this one:
1:sangan
2:DCK
3:LaDD
resolving:
3: LaDD was chained to sangans effect but is in chainlink 3.
So it wont be able to negate sangan, since its not directly under it in the chain.
And if LaDD doesnt negate, it doesnt loose atk and def.
2: DCKs eff will activate and negate sangans eff
1: negated
rulings bout that :
If you have 2 or more “Light and Darkness Dragon” face-up on your side of the field when a Spell, Trap, or effect of an Effect Monster is activated, the effect of each “Light and Darkness Dragon” form a Chain, but only the effect of the “Light and Darkness Dragon” chained directly to the activated Spell, Trap, or effect of an Effect Monster will resolve. The other “Light and Darkness Dragon” on the Chain will not negate the activation of the Spell, Trap, or effect of the Effect Monster and they will not lose any ATK or DEF from their effect
So now we take the TKR Darksoul and LADD situation
chain 1: darksouls eff activates
chain 2: LaDD wants to negate it
resolving
2: LaDD negates Darksoul and looses atk/def
1: negated
TKR isnt in this chain because continuous effect monsters dont chain.
If LaDD wouldnt be there it would be like :
darksouls mandatory eff get activated, but thunder king raioh will prevent to get a card from the deck to the hand unless its drawn.
So Darksouls eff just vanishes.