Protopithecus

Landfall -- Whenever a land enters the battlefield under your control, Protopithecus gets battle cry until end of turn.
With slightly longer arms than legs, Protopithecus resembled spider monkeys, but its limb bones were nearly twice as thick. Its head was more similar to a howler monkey's, which has a lower jaw that juts forward to accommodate an apple-size vocal sac.
As such, It may have been able to howl just lik