Youre not going to get a better ramp option in white, and it even draws you two Plains to kick things off
A typical play pattern back in the day was casting your first Jar, finding a second copy of it, casting it again, and then eliminating your opponent with the help of Megrim
From there Zada uses anthems and rituals to assemble a lot of mana
He makes you the Monarch when he enters and his third line of text makes it harder for your opponents to block, or makes them unable to block at all if you're the Monarch
Every time something enters from the graveyard, Kotis grows larger with +1/+1 counters, which means pairing it with recursive creatures like Gravecrawler quickly turns this Champion into a massive threat that cant be ignored
Jegantha's Companion condition is easy to meet, and its tap ability adds WUBRG, perfect for Jodah's ability