For the same speed and cost it targets and exiles everything
And sure, Barus a reasonable incentive to do it, since +2/+2 and trample is exactly the type of buff that most wurms need
Legendary Creature - Elder Dinosaur Zegana, Utopian Speaker When Zegana enters, if you control another creature with a +1/+1 counter on it, draw a card
But the pools of artifact and enchantment support cards are so deep that you dont really need a particular reason to piggyback some prowess cards on top of them if you simply decide thats the direction youd like to take the deck
Besides its ability when it enters the battlefield, this artifact interacts with the descend mechanic (when you put a permanent into a graveyard from anywhere) to turn into a land
"The other six cards are the only copies to be graded by the company thus far", it adds