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Secondly, her -4 ability does remove two creatures from your opponent's side of the battlefield, but it gives your opponent the choice of which creatures
You need a high concentration of elves, but the mana production comes at a great rate
All of that is for two mana as well, meaning you can do this every turn from turn three onwards - or even earlier if you can generate the mana for it
Arcane Encyclopedia, while not a direct comparison, still beats out the Intelligence Bobblehead in terms of value
Theres also the 10 poison counters win condition, which started as an alternative win condition but can be considered a third way to win based on how much poison there is in competitive Magic