another flavor-heavy creation from me. I think this one is self-explanitory enough to stand on it's own. I'm not sure what colour he belongs in though; I think his CMC should be 3-4 with 1 coloured mana.
Aether Vampire
creature-- spirit
2/3
Aether vampire does not untap during your untap step unless it has a Prana counter. At the beginning of your upkeep, remove all Prana counters from Aether Vampire.
When Aether Vampire deals combat damage to a player, you may tap target land that player controls. If you do, put a Prana counter on Aether Vampire.

: Put a Prana counter on Aether Vampire.
Current Wording
Aether Vampire
creature-- spirit
2/3
Aether vampire does not untap during your untap step unless it has a Prana counter. At the beginning of your upkeep, remove all Prana counters from Aether Vampire.
When Aether Vampire deals combat damage to a player, you may tap target land that player controls. If you do, put a Prana counter on Aether Vampire.
: Put a Prana counter on Aether Vampire.