Offering altar is a mod that let you spawn mobs by using theirs drops/most loved items.
An offering consume one of the selected item, spawning between 0 / 1 / 2 / 5 / 10 mobs.
Mobs that can be spawned are : zombie (5% chance of being either a husk / drowned / zombie villager / zombie mounting a zombie horse), with a rotten
flesh.
skeleton (5% of being either a stray / skeleton mounting a spider / skeleton mouting a skeleton horse / whither skeleton), with
a bone.
small slime (25% for a medium one / 10% for a big one / 1% for an even bigger slime, size not vanilla), with a slime ball.
enderman (5% for an endermite instead), witn an enderpearl.
blaze, with a blaze rod.
shulker, with a shulker shell.
allay, with an amethyst shard.
