Carharoth, Red Maw

Menace, Trample.
As this creature enters, you may sacrifice any number of creatures and/or artifacts. If you
do, it enters with three times that many +1/+1 counters on it.
Carharoth, Red Maw can only be blocked by legendary creatures.

"But Carcharoth looked upon that holy jewel and was not daunted, and the devouring spirit within him awoke to sudden fire"