Combos Utilizing Voltaic-Key

discard to untap key/academy to untap candelabra

w/ the key, u untap the vault getting infinit turns(island is good because blue uses drawing cards)

tap plains to have voltaic key untap braidwood cup. gain 2 life each turn.

two words. infinate turns think about it

sac black lotus for 3 mana, cast a sol ring giving you 4 mana then cast voltaic key and time vault, use the remaining 1 mana for untapping time vault. result: infinite turns! =)

You Gain a lot of life and play the Processor then play the key to make more creatures

tap the boa for +3/+3, use thran forge to turn it into an artifact creature, and untap it with voltaic key for a 7/6 creature!!!!!!!!!!!!!!! repeat if ya want.

Untap Grindstone whit Voltaic Key

counter opponents spell while attacking them with creatures . eye of ramos gives you mana and voltaic key untaps your eyes of ramos. Then use creatures like indentured djinn or spinedrift drake!!!

If you have enough mana you can deal about 3 damage each turn. Just keep untapping Rod of Ruin with the Voltaic Key.