Rather than ramping to big Creatures or going wide with 100 Creatures, Elven Councils Commander Galadriel, Elven Queen relies on voting of the council to generate value from +1/+1 counters, card draw, or the sets theme mechanic: tempting of the ring
For Commander, an MDFC includes both sides in its color identity
Sliver decks often have some disposable creatures that would allow you to attack as a band and keep the attackers you need alive
So, players wishing to buy it would have to flock to big-box stores like Target or Wal-Mart and pray it hadn't sold out by the time they got there
Emry, Lurker of the Loch in particular is a highly played card in formats where its legal (Pioneer, Modern, Legacy, Commander)