The creature must have been turned face up before dealing combat damage to a player for Kaust, Eyes of the Glade's first ability to trigger
Maybe youre a longtime player tired of grinding in competitive tournaments
Originally, the Glass Casket could capture any size creature, but playtesting showed that was a little too strong, so rather than raise the cost, we limited it to creatures of converted mana cost 3 or less
Throw in cards like Seedborn Muse that can untap The Ooze turn after turn, and youve got quite the value engine on your hands
Wizards had high hopes that Lord of the Rings would outsell its normal sets - which were vindicated when it became the second best-selling set up to that point
I didnt include any ways to give it indestructible so you might want to consider the option if youre looking to use it more in combat