Repeast always: /execute @e[type=Husk] ~0 ~0 ~0 /summon Zombie ~ ~1 ~ {IsBaby:1,CustomName:Crawler,Invulnerable:0,ArmorItems:[{},{},{},{id:red_flower,Count:1,Damage:2}],Attributes:[{Name:generic.knockbackResistance,Base:0},{Name:generic.movementSpeed,Base:0.12}],ActiveEffects:[{Id:8,Amplifier:254,Duration:2400000},{Id:14,Amplifier:0,Duration:640000}]}


Chain always: /kill @e[type=Husk]

/scoreboard players tag @e[type=item] add kill {Item:{id:"minecraft:red_flower",Damage:2s}}

/kill @e[tag=kill]