Sure, you do need to pay six mana if you want to find your Azusa, Lost but SeekingAzusa, Lost but Seeking, for example, but it does offer significant upside
To enlist a creature, that creature must be untapped, it must not be attacking (even if it has vigilance), and it must have haste or have been under that attacking player's control since the beginning of their current turn
Using this on the most common mana value in your deck for quantity or the value of your biggest game-changer for quality would be great options for using your time counters wisely
However, with just a few Build cards in your deck, this downside is completely negated
We also see our odds of drawing another Powder go down as each time we use Serum Powder, it exiles itself
The Rare is the same for the main and sub-themed Jumpstart Lord of the Rings booster packs