The good old "Word of Death"/"Dagger of Death" trick from Oblivion: Get access to a spell create/enchantment alter (Mage Guild quest or Wizard Tower DLC), and create a spell/enchantment which drains 100 HP for 1 second. As drain is a temporary effect, it costs little mana to cast/has many charges, but if the target's HP goes below zero it dies and doesn't come back when the spell ends: Essentially giving you instant one-hit-kills on almost anything until you hit about level 8 - 10, and most enemies have more than 100 HP.
Also the save/reload looting of dragon corpses in Might & Magic 7: You could deck out your party in some of the best items the game had to offer (including some Artifacts/Relics) before even leaving the starting island. Just had to kill a red dragon with your standard low level gear first...
Both makes the games considerably less fun to play though (though only temporarily so in Oblivion), as much of the challenge/loot incencitive is lost.
Also the save/reload looting of dragon corpses in Might & Magic 7: You could deck out your party in some of the best items the game had to offer (including some Artifacts/Relics) before even leaving the starting island. Just had to kill a red dragon with your standard low level gear first...
Both makes the games considerably less fun to play though (though only temporarily so in Oblivion), as much of the challenge/loot incencitive is lost.