Its interesting for a few reasons: you typically build your own deck based around some strategy, and so you need to think about the probabilities of drawing certain cards in a game (there are also cards that exist purely to manipulate the probability of drawing a certain card)
Another might chip away with just their commander and keep back a murderers row of Royal Assassin lookalikes to discourage retaliation
Moving next to the actual activated ability which Thrasios provides access to, lets first look at it by face value and then see how we can really use this in the cEDH context
The second is that if youre building your deck to be dense with legendary creatures, which you really want to be doing with Kolvori in your deck anyway, the restriction on using the Crests mana is much less painful
This card is simply wonderful to use in various decks and formats thanks to its flash, flying, and vigilance keywords, as well as the fact that it can act as a draw engine that becomes more powerful over time if opponents use tutor-like abilities
Each card in a Collector Booster is special in some way
