Myr Retriever:
"When Myr Retriever is put into a graveyard from play, return another target artifact card from your graveyard to your hand. "
Suppose you sacrifice Myr Retriever to another card, say Ashnod's Altar, can you use its ability to return itself to your hand? Or does "another target artifact" mean "besides Myr Retriever"?
"Another target artifact" does indeed imply "besides Myr Retriever".