Cores of Magic

A core of magic is a powerful thing. Created by ancient artificers to power their most power-hungry devices, these basketball-sized glass spheres with the essence of magic writhing inside them emit powerful energies if harnessed correctly. Enough cores of magic created in the same place can cause the magic in that area to become permanently weakened.
The giant war machines of old decimated each other and were quickly resigned to history. At some point, a crafty artificer managed to harness a core of magic into a smaller construct. A human-sized construct powered by a core of magic will roll 1d10 per turn (or equivalent short period of time) to determine what additional power the core of magic energies have granted it.

1. Blue - The construct teleports a short distance (15ft) as the core warps the world around them with a pulse of blue light.
2. Red - The constructs attack is more powerful (+3 damage) as its swing moves faster than anyone can think.
3. Yellow - The construct is surrounded by a yellow barrier of force, blocking the next attack.
4. Green - Any defeated constructs nearby are rebuilt, although still heavily damaged (Returned to life at 1/4 health), as green energy tentacles reach out from the core.
5. Purple - The core fires out bolts made of force, hitting every enemy for light damage (1d4+1 damage per target).
6. Gold - The construct glows gold, repairing some of the damage it has sustained (Heals 1d10 damage).
7. Silver - The construct glows silver, then two more do as they flicker into existence. There are 3 versions of this construct until the core changes color (They act at the same time, and all take the same damage).
8. Black - The world turns dark. No light can pierce the absolute darkness in the vicinity.
9. White - Time stops allowing the construct to take two turns (or equivalent) in the time it takes you to blink.
10. None - The core seems empty. No spells can be cast in the vicinity until it changes color.

When the core is shattered the magical effects burst into the world, being absorbed into objects nearby and giving them a minor magical property.