4 Oct 2004
You can't sacrifice more than one artifact to this spell.
4 Oct 2004
The one from the library enters when the spell is resolved, and this does not count as the casting of an artifact.
4 Oct 2004
Because the "search" requires you to find a card with certain characteristics, you don't have to find the card if you don't want to.
4 Oct 2004
If the chosen artifact costs less than or the same as the sacrificed artifact, you simply put it onto the battlefield without paying any additional costs.
4 Oct 2004
Additional mana spent to cover the differences in mana costs is not part of the mana cost of this spell. It is spent during spell resolution.
1 Jan 2011
The sacrifice of an artifact is an effect of the spell, not a cost, which means it happens as the spell resolves. If Transmute Artifact is countered, you do not have to sacrifice an artifact.