If you're after pulling rare cards, your chances are between 1% and 25%, with Full Boarderless Mythic Rare Turtles having a pull chance of under 1%
Mardu has plenty of ways to buff them, give them special keywords, and even Zurgo himself likes to keep them around for a few more turns
Collectors are on the hunt for that one cardand some are offering big payouts for it
Not to mention with table play coming back, the excitement of watching the gamble either pay off or fail miserably is tempting
Example: A creature is affected by Giant Growth and then phases out during the same turn
Korozda Guildmage provides useful support at all stages of the game, whether you're trying to stabilize, on the attack, or locked in a standstill