If your curve is low enough, you should be able to reliably get back quite a few cards if youve been filling your graveyard throughout the game with self-mill or other means
These are the rarest cards that can be pulled from packs and products, with a very low pull rate
In your developing turns, the flash on it offers you an amazing level of flexibility, letting you waste your opponents mana by not letting them use removal on your turn, catching your opponent off-guard sometimes (especially if they dont realise youre on Mono-Blue), and letting you hold up countermagic whilst still threatening to develop your battlefield if you dont need to counter something
Jumpstart 2022 Boosters can be combined with packs from any other Jumpstart product to play a game, including the recently announced Dominaria United set-specific Jumpstart boosters (see "Dominaria United' Product Line Deets")
Let me give you a simple example
Tribal Reanimator Commanders (Scion of the Ur-Dragon, Horde of Notions, Gisa and Geralf, Kaalia of the Vast, etc.) There are a LOT of commanders well suited to tribal reanimator strategies, but the 4 I have listed here exemplify what you should be looking for when narrowing down which legendary creature should be at the helm