Changeling (This card is every creature type.)
When this creature enters, create a tapped Mutavault token. (It's a land with ": Add " and ": This token becomes a 2/2 creature with all creature types until end of turn. It's still a land.")
: Add 
" and "
: This token becomes a 2/2 creature with all creature types until end of turn. It's still a land.")