Oliphant

Trample
Horse (See 'Spastic Horse' for definition)
Oliphant can have more than one rider.
Oliphant has +1/+0 for each rider it has.
"Grey as a mouse, Big as a house, Nose like a snake,
I make the earth shake, As I tramp through the grass;
Trees crack as I pass. With horns in my mouth I walk
in the South, Flapping big ears. Beyond count of years..."
- J.R.R. Tolkien, The Lord of the Rings, The Two
Towers, "The Black Gate is Closed"