isleward/src/server/config/effects/effectInvulnerability.js

module.exports = {
	type: 'invulnerability',

	events: {
		beforeDealDamage: function ({ damage }) {
			if (damage)
				damage.amount = 0;
		},

		beforeTakeDamage: function ({ damage }) {
			damage.amount = 0;
		}
	}
};