This card is utterly terrible. It cost 8 mana
for a 6/6 creature. Yeah it has an ability.
Yeah, it has Trample. That still doesn't make it
acceptable.
By the time you cast the creature, the ability
won't be that great. Your opponent has probably
played through a large number of their key cards
at that point. Unless you're using some
graveyard manipulation trick to get it into
play, I wouldn't even bother with this creature.
Brutal, but a bit slow to hit the board. Still
worth throwing in your limited deck if you have
a worthwhile Blue Black build (they do exist).
If you get to hit your opponent, you will
definitely hear some groans. In casual, this
could be a card that some sinister casual player
would like to build a deck around.
I just do not like cards that cost eight mana.
They usually aren't good enough to see play, and
even if they are, it is usually because you are
either (a) tricking them into play or (b) basing
an entire deck around getting it into play. Now,
don't get me wrong, there have been good
eight-drops -- Akroma, Angel of Wrath for one.
However, Mindleech Mass just isn't doing
anything for me. It costs too much for too small
of a body and an effect that is mediocre at
best. As long as you have a turn to react,
Mindleech Mass isn't that frightening to be
across the board from.