#4. Proud Defender

A well-statted Taunt minion is always useful in Arena. Proud Defender retains the effect from Tar Creeper (which is rotating out) but more conditionally so. A 4/6 Taunt if you're behind on the board can buy you some time. The attack doesn't matter as much as it's health. At 6 health, opponents will still need to clear that much health.
However, it is probably weak to heavy removal from classes such as Mage or Rogue.
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#3. Soldier of Fortune

An over statted minion for its cost? Mostly does well in Arena. Soldier of Fortune's body stats and cost is reminiscent of Hoarding Dragon from Kobolds & Catacombs. That's if you attack twice. It is not a bad pick on the 4-drop slot and it can be used defensively and offensively pretty well.
There is the obvious downside of letting your opponent get out a minion early through Coins, but that also depends on how well they are drawing and maintaining hand size.
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