Displaced Dinosaurs is one of the few non-historic cards that cant be removed
Its not particularly exciting, although I imagine you could run it in your Zedruu the Greathearted deck, have it do its thing and then donate it
While it doesnt exile permanents, unlike its Battle for Zendikar counterpart Ulamog, the Ceaseless Hunger, destroying a permanent is still noteworthy, and coming with Annihilator 4 allows you to put one of your Commander opponents into absolute ruin
Similar to the other Forces from the MH1 cycle it can be cast without tapping any mana, making it automatically very interesting in the fast Modern environment
If you're starting without any Zombies, it takes a very long time before you start amassing a large battlefield of Zombie tokens, and at that point, you likely could have built enough of an army of regular creatures