Right click detection

/summon Villager ~ ~1 ~ {CustomName:"spell",Profession:0,CareerLevel:1,Offers:{Recipes:[]},NoAI:1,Silent:1,ActiveEffects:[{Id:14,Amplifier:1,Duration:20000000,ShowParticles:1b}]}

/summon Villager ~ ~1 ~ {CustomName:"spell",Profession:0,CareerLevel:1,Offers:{Recipes:[]},NoAI:1,Silent:1,ActiveEffects:[{}]}