execute at @e[tag=eg] run summon minecraft:area_effect_cloud ~ ~-10 ~ {Duration:1,WaitTime:10,Tags:["aec_eg"]}
execute unless entity @e[type=minecraft:elder_guardian, limit=1, tag=eg] at @e[tag=aec_eg, limit=1] run summon minecraft:elder_guardian ~ ~10 ~ {Tags:["eg"]}
execute unless entity @e[type=minecraft:elder_guardian, limit=1, tag=eg] at @e[tag=aec_eg, limit=1] run kill @e[tag=aec_eg]