Changeling The original Lorwyn block is remembered fondly for its typal strategies
Witness is mostly used to secure some redundancy on thinly stretched decks with roughly one answer each for a variety of things or as part of a creature focused combo deck
Especially appealing are equipment with prohibitive equipment costs, making Colossus Hammer a shoo-in
For example, a 1/1 creature, a 3/1 creature, and a 4/6 creature have three different powers (specifically, 1, 3, and 4)
Appearance isn't everything (we still love you, Grimer, you weird-looking, living blob of dirty oil) but it's an important factor when trying to whittle down over 16,000 cards to find the most important
One strong one uses Lurrus of the Dream-Den, Phyrexian Altar, and Kaya's Ghostform to sacrifice and recur Lurrus infinitely for infinite death, ETB, and cast triggers