Diableria

 is an active ability, which means it will only activate once the creature has a full bloodlust counter.  For a list of all Cards with this ability, click here! 

Variations
can appear as certain activation, or with a chance to activate. It can activate on Entering Play, on leaving play, or during the card's turn. The damage amount ranges from 1 to 4.

Strategy
Diableria works well with Shadowstep to build a fast deck, that can defeat your opponent before his big monsters become active! Note that a Mount will block damage from diableria!