With each pack you pay to open, you roll the dice on getting a cool-looking or powerful card
If you gain an amount of life "for each" of something or "equal to the number" of something, that life is gained as one event and Heliod's ability triggers only once
Compared to previous Starter Decks, Azurite Sea feels on par with the ones from Into The Inklands ' puppy-centric Amber/Emerald deck (my personal favorite until now)
Partner (You can have two commanders if both have partner.) If one or more Pirates you control deal damage to multiple players at once (for example, in combat, or with an ability such as that of Lightning-Rig Crew), Francisco, Fowl Marauder's ability triggers once for each of those players
Card advantage The most important resource in Omniscience draft is cards: how many do you have in hand, and how many have resolved into permanents on the battlefield
Likewise, if an effect like Elesh Norn, Mother of Machines prevents ETBs from happening, a living weapon equipment will fail to make the creature token, and will sit in play unattached to anything