Proceed with caution: Gandalf the White: $20-$90 (buy for about $20) Aragorn, the Unifier: $16-$45 (buy for about $20) Radagast the Brown $7-$15 (buy for $15 or less) There are other cards that have seen a spike, but there are still outliers past what the real spike is
Hexproof or Ward While not directly replacing regeneration, these abilities reduce how often your opponent can target your creature, which can keep it alive
It just won't see as much play by quite a long distance as something like a Maelstrom Pulse, Vraska 4, or any mono coloured staple
With cheap artifacts like Moxes around, it's easy for Tolarian Academy to tap for a lot of blue, acting like a blue-only Mishra's Workshop at the very least
Perfect deck box for any standard size cards
Once activated, Change of Heart allows the player to take control of an enemy monster until the end of the turn