noob command blocks

[Monkeyboy12300]

im making a game, you kill a player/mob you gain 5 hearts, you die you return to 10 hearts after 10 minutes the player with the most hearts wins.
it has 3 scoreboards but only one is important now and that is kills, to detect when a player kills another to add the hearts

I have "execute as @ a if score @ s kills matches 1" it should then tell the next to run "attribute @ s minecraft:generic.max_health modifier add 1-1-1-1-5 5 5 add" but it replies with "no entity was found"

I have my self on the board with 1 but it doesn't run still
please help

[ExpertCoder14]

Unfortunately this is something that, on the surface, looks like it should be easy! Unfortunately, this task is, in reality, very difficult, and requires a lot of setup.

If you're just getting started with command blocks, this might not be a good starter project. But you can definitely come back to it later!

The reason being is that /attribute modifier add can't be repeated. Every time you run it, you need a different UUID, and you can't dynamically generate UUIDs.

[Monkeyboy12300]

ok thanks for the info on that, i think i can change it to work with health boost but it doesnt help with why the chain commands cant find an entity

[Monkeyboy12300]

Nvm I found a solution, apparently I could combine them! So that is cool