Token and copy effects like Mirrorworks, Birthing Boughs, and Saheelis Artistry multiply your threatsand your destruction
Conversely, the Rootgrazer can tap to return a basic land to the hand, allowing the player to use the same land for multiple Landfall triggers
Apart from the ability, just look at those gnarly stats four lore, and 5/7 on the strength/will power
While it's not great as a Rogue Tribal commander since 1) it doesn't really support Rogue Tribal 2) its "roguejutsu" requires Zareth to be in your hand, not command zone, Zareth is still a great card in the 99 of Anowon, the Ruin Thief since his combat trigger is absolutely brutal, basically a more flexible Ink-Eyes, Servant of Oni trigger
You can assemble combos off it or simply dig through a toolbox of the best legends to combat whatever your opponents want to do