If you have 6 or fewer cards left in your Library:
1. Can you even play Liquidation?
2. If so, do you burn however many cards you have left and gain 3 pool, or must you burn 7 cards to get that effect?
Master. Do not replace until your discard phase.
Burn seven cards from the top of your library to gain 3 pool.
Baron of Sydney, Australia, 418
An answer to the same question on the newsgroup:
IANLSJE(ither), but I'd say you can't play it, because you can't pay the <cost>to<effect>. Just like you can't play a card that says "tap 2 minions to..." if you don't control 2 untapped minions.
That was one of the rulings I found, but it seemed to contradict this one:
> Can you play the card if you have less than 7 cards in your library? If
Yes. You burn the remainder of your library in that case.
> so, do you still gain 3 pool from it? I ask because the word "burn" used
No. Card text: "to"
> in the context of burning blood has interesting consequences to this
> effect if it is applicable.
It has the same meaning when use with "to" in regards to blood, as well.
But given that the other one is the most recent, I assume it's correct ("more" correct?).