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Five mana to tutor a dragon, in your mana base

So my most influential heuristic is how well you can open 'on average.' The more premiere removal at common or uncommon, the higher I personally rate it

(2023-10-13) Although Doctor's companion is a new variant of the partner ability, the rules for partner have not otherwise changed

Only Standard Cards

Even when Azami comes into play, you are able to tap Wizard (or Azami herself) to draw a card

Part of that is that having multiple 5/5s in play as early as turn 5 can stop other decks from attacking into you to gain advantage, and those 5/5s being quickly lethal also stops those same players from going shields down and attacking each other for long, too