Idea posting here for reminder and brainstorm.
Twilight addon with components from Twilight resources

List as follows:
Ironwood - Reinforced
Steeleaf - Reinforced II
Timewood - Mending
Firey ingot - 10% chance to deal AoE fire damage when damaging an entity
Knightmetal - Spikey

Weapon upgrades:
Experiment 115 - 5% chance to kill you when damaging an entity (can be stacked)

Scepters can be added as a upgrade to weapons to give them abilities:
Scepter of Twilight has a charge that shoots projectiles at enemies
Zombie Scepter has a charge that spawns friendly zombies that attack only players
Scepter of Life Draining has a passive life-steal and charge that drains the health of entities to heal you for 50% of the health drained.

Correct me if I'm wrong, but ExtraTiC should work for extra tool parts (Only works in 1.7.10 and below).

This isn't 1.7.10 and below.

No the life drain would add a form of nectrotic