If you try to go to four colors, you need more different fetchable lands, which means you get fewer fetchlands, so more of your lands only offer access to one or two colors instead of three or four colors, and you cant make the numbers work
Dredge also cant proactively answer Surgical Extraction the same way they can destroy Tormods Crypt with a catchall Abrupt Decay
For those familiar with Throne of Eldraine, they already have the first part of her story and are excited to see where it goes
"Zodiac Miracle" Trap - Continuous Effect: When a "Zodiac" monster you control is destroyed by battle or by card effects: You can Special Summon it back to the field in Defense Position, and if you do, equip this card to it
When this card is Normal or Special Summoned: You can target 1 Spell/Trap Card your opponent controls
Alania is illustrated here by Issei Murakami and shows the Otter Wizard carding two different spells, one red and the other blue, reflecting their Izzet coloring