This will keep happening until our opponent is dead, giving us infinite damage
Protect Kaalia with cheap support pieces like Boots of Speed, Kayas Ghostform, and ramp her out early with mana rocks
Take a look: Adventure cards can go on their adventure to exile then enter the battlefield when you cast them from exile
Collectors storing high-value cards say a holographic Charizard from the Base Set era often double sleeve, then place in a toploader, then into a binder
This also gives you spare parts for future upgrades as you improve your deck over time
In addition, milling an opponent can often help some graveyard-based decks who might want their cards in their graveyards in the first place, or it may also help turn on the graveyard mechanics of their cards in play like Delirium