Soul Shards 1

SoulShards is a mod created by ShadwDrgn. This mod adds Soul Shards to the game, allowing players to kill hostile mobs and 'trap' their souls; mob spawners may also be absorbed with the Soul Shard. When a Soul Shard has enough charge, it may be placed in a Soul Cage to create a spawner; the Soul Cage will react depending on the tier of the Soul Shard put into it.

Here is the list of tiers for Soul Shards: T1: 64 T2: 128 T3: 256 Kills T4: 512 Kills T5: 1024 Kills