Some equivalents to Reckless Abandon (red, sacrifice creature for damage) are:
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Collateral Damage – Sacrifice a creature, deal 3 damage to any target. (Faster, instant speed)
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Fling – Sacrifice a creature, deal damage equal to its power to any target. (Depends on creature size)
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Improvised Weaponry – Deals 2 damage to any target, makes a Treasure. (No sacrifice, less damage)
Reason: They are all red, involve sacrificing or trading creatures/resources for direct damage.