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They can also be played in Draft and Sealed

The reasoning behind this was that there were some players who disliked DFCs, a number of them being Wizards employees, and they were worried they'd be a colossal flop

For example, cards like Angel of Jubilation and Yasharn, Implacable Earth can be used to prevent an opponent Sacrificing their own creatures, and Tarjuru Preserver or Sigarda, Host of Herons stops foes from forcing you to Sacrifice creatures

So your rating is in line with my own experience playing with and against Library

If you do, put a card from among those cards into your hand

The difference is that the land goes into your hand if no one controls more than you, similar to Scholar of New Horizons