The moonfolk on Kamigawa had a theme built around returning your lands to your hand, which is why this ability triggers the way it does, but in Limited this is very hard to have any control over
If both creatures are Legendary, like Brallin, Skyshark Rider and Shabraz, the Skyshark, you can still run both as your Commander like any other Partner
Though it's got a pretty steep cost at two of each color of mana, Progenitus can be really annoying to get rid of for opponents
(Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.) Illustrated by Mathias Kollros Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Legal Comp
You can download and use this older one, and it will auto-update to the latest version