Glavenus

Trample, Menace, Fireblight (Creatures damaged by this creature get 0/-1 until your next turn.)
{r}: This creature gets +1/0 until the end of the
turn.

A brute wyvern that wields its heavy blue tail like a
blade. It grows hotter and more keen with each
strike until it glows red. Not only is it considered
one of the strongest Brute Wyverns, it is even believed to be the most intelligent as well.