execute as @e[type=phantom,tag=!plussed] run data merge entity @s {DeathLootTable:"survivalplus:entities/phantom"}
execute as @e[type=phantom,tag=!plussed,predicate=survivalplus:20chance] run data modify entity @s size set value 1
execute as @e[type=phantom,tag=!plussed,predicate=survivalplus:20chance] run data modify entity @s size set value 2
execute as @e[type=phantom,tag=!plussed] run tag @s add plussed