sliver mtg commander deck EDH Deck Hivelord 100 Magic Cards Custom Slivers Sliver Kindred 5 Color 98 nonfoil cards) Slivers Mtg The First Sliver

The effect of exile doesn't trigger only from Inti's ability, but any discard

Krark's Thumb Krark's Thumb is a staple for any deck built around flipping coins

Even if you don't need to fix your lands, it will allow you to know your first couple of draws, making sure you hit the cards you need to have a strong start

and the list just goes on

If you can surround it with a high enough density of instants and sorceries, it ought to be very strong, but you need to build around it to an extent

Honestly, both RTR planeswalkers are questionable even in Standard, so I expect that neither Jace nor Vraska the Unseen will see play in Modern