playsound entity.warden.heartbeat hostile @a[distance=0..] ~ ~2 ~ 8 0

particle minecraft:flash{color:[1,1,1,1]} ~ ~2 ~ 0 0 0 1 1 force
particle minecraft:end_rod ~ ~2 ~ 0 0 0 0.2 3 normal
particle minecraft:dragon_breath ~ ~2 ~ 0 0 0 0.2 4 normal

scoreboard players reset @s stellarity.dragon.heartbeat
