Shrine

A shrine block that must be loaded with emeralds. The shrine block can be bound to a pet, that way if your pet dies it can be brought back at the cost of emeralds. Not only must you put emeralds into the shrine block for each summoning, the shrine block must also be surrounded by emerald blocks for it to work, ultimately it will look like a summoning platform. I suggest this because right now horses and dogs are often shoved away into player houses, players are too afraid they'll die if brought along on adventures.