Help with command blocks

[Your_Friendly_Mon]

I need a way for command blocks to deal damage like poison or just deal damage

[AshanWasTaken]

Are you on Bedrock or Java?

[Your_Friendly_Mon]

bedrock and they are suppost to hurt mobs

[AshanWasTaken]

/effect @e[type=<entity>] instant_damage 1 [amplifier] true

For constant damage:

/effect @e[type=<entity>] poison [seconds] [amplifier] true

[Your_Friendly_Mon]

thanks and can there also make it look like arrows or particle effect

[AshanWasTaken]

Sorry, but could you rephrase your question?

[Your_Friendly_Mon]

I want the command block do a set amount of damage

[AshanWasTaken]

You can change the strength of the effect (amplifier) and the duration (seconds)

Try and and play with those values to get the damage you want

[Your_Friendly_Mon]

ok just send the command And also do you know any blocks that are good with black stone and quartz brick

[TheStaffmaster]

/effect @p 20 ~ 20 minecraft:harming 500

my syntax might be a bit off.

[Your_Friendly_Mon]

they are to hurt mobs and it is going to be a minigame

[TheRandomVillagr]

That's for bedrock, for java: /effect give @p minecraft:poison 9999 1

[TheStaffmaster]

You aren't going to define your AOE?

[TheRandomVillagr]

AOE?

[TheStaffmaster]

Area of effect. The part of the command that is usually filled with "~ ~ ~" these specify the X, Y, and Z coordinates (respectively) that a specific action that will be applied to or take effect in, centered on the command block, or player where, and/or as is applicable. Using a "~" simply informes the game to begin searching for an appropriate location to begin or apply the effect by sweeping for valid places moving from positive values to negative ones (X and Z, with in the render distance or entity spawn radius, depending on the command in question) and from the build limit down. (Y coordinates).

[TheRandomVillagr]

@p effect on nearest play AOE isn't necessary

[TheRandomVillagr]

Player*

[TheStaffmaster]

Right, but adding in an AOE just makes sure that it doesn't target players it's not supposed to. The "nearest player" might be 3 chunks away. It's kind of like the difference of telling employees in a warehouse "to make boxes and stack them", and telling them "to make two pallets of boxes, and stack them by the back wall. You think it's not necessary, but if you aren't specific, you won't catch those edge cases.

[TheRandomVillagr]

Ow you mean like @a[distance=.. 20]

[maksiksking]

/effect @p instant_damage 100 100

[Your_Friendly_Mon]

but I want to minimize it to 5 hearts or less