Since some people have been worrying about elementals' poor choice when coming to draw engines (they only have Antimatter and Stardust Extractor), here's an idea I came up with.
2cc
Harvest of Energy
Support ability
Sustain: 1cc
Duration 4. At the end of your turn, draw a card if you have fewer than 5 cards in your hand.
When Harvest of Energy is destroyed during your turn, all opposing heroes take 2 electrical damage.
