GTSoulStones

It's a fairly simple concept, I hope. Take a diamond, and hit an Entity with it (any monster, animal, etc). It becomes a SoulStone for that creature type. It has a (somewhat randomly) amount of SoulStone points to achieve. Keep hitting monsters of that type with it, and it fills up.

Once full, it either (80%) turns into a stack of a random quantity of Spawn Eggs for that Entity, or (20%) into a SoulStone Pickaxe.

SoulStone Pickaxe has a number of points on it. Walk up to Stone, and hit it with the SoulStone PickAxe, and it generates a branching-out network of ore and ore-blocks extending from the block you started with. Hit an existing "ore block" (diamond-block, redstone-block, emerald-block, etc), and it uses a multiplier.

Example: Diamond hit an Enderman. Got an "Enderman 720 Pt" SoulStone. Hit LOTS of Endermen, and eventually it fills up. This creates either a stack of 6 Enderman Eggs, or a Soulstone Pickaxe (90 - 240 pts). Hitting the center of a large flat stone space created: 2 diamond ore, 8 gold ore blocks, 15 gold ore, 8 slime blocks, 10 nether quartz blocks, 3 emerald ore blocks, 12 emerald ore, 6 iron blocks, 9 iron ore, 6 quartz blocks, 1 redstone block, 21 redstone ore, 6 coal block, 17 coal ore, and 8 lapis ore. It will sometime create diamond blocks and lapis blocks.

Example: Diamond hit a Chicken. Chicken Soulstones (20-76 pt). Fill them up (kill roughly 10-30 chickens, to fill stones). 1st one, received 2 Chicken Spawn Eggs. Then 6 Spawn Eggs. Then Soulstone Pickaxe, with 8 pts. Using this on stone, got 4 Gold block, 2 slime block, 2 redstone ore, 2 emerald ore, 2 iron ore, 1 lapis ore and 1 coal ore.

(this doesn't just give you the ore... it turns Stone blocks into these ores/blocks, and you still have to mine it).

Allows a server, especially a well-picked-over one, to have more resources. Also, allows for easier "relocation" of farm animals and villagers! (kill Villagers with Villager Soulstone, and have 80% chance of a stack of Villager Spawn Eggs).

Below is an example of the highest-level Enderman Pickaxe (kill 50+ Endermen using only a Diamond), being struck on a Diamond Block. Then I removed all of the surrounding Stone.

Major payoff, but also a ton of work. Especially since Pickaxes only happen 20% of the time.

(mc.goal-time.com is a test server that you can connect to to experiment with these features)