Dendar, Ophidian Queen

Deathtouch, First Strike, Haste, Indestructible, Menace, Reach, Trample
Other snakes you control have deathtouch and haste.
If you have both Sseth, Sibiliant Death, and Mershaulk, King of Snakes on the battlefield, those two creatures get +3/+3 as well as Dendar, Ophidian Queen.