Spectral Bat

Strategies
Before it gains the Drain ability, the Spectral Bat is just a more expensive worst version of the Parrot], which can resist more attacks due to its superior Health and costs only 2 Energy points instead of 3. Also, the [[Parrot is a Common card, so it will be easier to level up, both in terms of cards and coins.

However, once it gains Drain, the Spectral Bat is a really good executioner option for a Drain Deck, dealing a good amount of damage fast (thanks to Ambush and reducing your opponent's Energy, making sure you will keep or even win board control.