Zectronic beam

A Zectronic Energy Beam was a powerful thing that could conquer the universe 'in minutes' according to the Doctor. When pressed about how this was to be achieved by his Emma of the non-canonical The Curse of Fatal Death, he said 'I'll explain later'.

Zectronic Energy was capable of destroying the regenerative process of a Time Lord, but nonetheless the Twelfth Doctor of the non-canonical The Curse of Fatal Death regenerated into Thirteenth Doctor of the non-canonical The Curse of Fatal Death.