4 Oct 2004
It does not replace any use of creature types in card text.
4 Oct 2004
This can grant a creature type to animated lands and artifacts that would otherwise have no creature type.
1 Aug 2005
If you choose Wall, then your creatures can still attack because creature types don't confer abilities such as defender (any more than, say, choosing creature type Bird would confer flying).
1 Aug 2005
"Legend" is no longer a creature type, and may not be chosen.
20 Sept 2013
Affected spells, cards, and creatures lose all of their other creature types.
29 Sept 2017
Replacement effects that modify creatures of a certain type as they enter the battlefield will apply (or not apply) after you apply this effect. For example, if Warrior is the chosen creature type and you control Bramblewood Paragon, a Runeclaw Bear would enter the battlefield with an additional +1/+1 counter.