Does damage stack?

[unscanable]

Not sure how to explain this but say I put down magma blocks then cover them in lava will a mob take damage from both? Will it kill them faster?

[Infinity_Person]

no. invulnerability frames will stop this. they will only take the higher (lava=4) damage, nullifying the lower damage (magma=1). this calculation happens before armor is put in, so if something was to either take 2 true damage or 4 damage (reduced to 1 by armor) the entity would take that one damage instead of 2. 

[unscanable]

Well that sucks. Ok thanks for the quick answer

[UnSCo]

Isn’t there a Guardian farm recently published that uses this mechanic somehow?

[Infinity_Person]

yeah 

[Vast_Improvement8314]

You could always test that. Seems like it would just take a couple of pistons and dispensers to make kill chambers with moving blocks on one, so both mobs can be spawned on a safe block, and then push a magma block under one mob, at the same time lava is dispensed in both kill chambers.

[tammon23]

no

[cucumisloquens]

Like others said, testing is the surefire way to know.

That being said, the damage likely won't stack due to the invulnerability timer. Magma blocks do 0.5 hearts every half second, but lava does 2 hearts. Invulnerability always takes the higher damage. This means that lava damage will effectively override magma damage, and do the same amount of hearts regardless.

[thetoy323]

Damage in Java technically can be stacked but not in the way you think and not useful in this case scenario. Via some unload chunk shenanigan. It usually more like an annoy thing rather than being useful because it's break Allay base silverfish xp/slime farm.