I have actually had some success lately with a Mutate deck. Nothing meta breaking, but a fun change from the normal.
4
Alseid of Life's Bounty4
Hushbringer4
Paradise Druid4
Mythos of Nethrol4
Dirge Bat4
Gemrazer4
Migratory greathorn1
Polukranos, Unchained1
Snapdex, Apex of the Hunt4
Auspicious Starrix1
Nethroi, Apex of Death2
Plains2
Swamp5
Forest4
Godless Shrine4
Overgrown Tomb4
Temple Garden4
Indatha TriomeMutate is not great, but since each effect can give you a card or destroy an opponents, you don't lose too much if your creature is killed. If you are allowed to start adding effects though, it can get crazy. Mutating onto the lifelinkers can win you races, and Alsied can cause problems for removal, plus it is a mutate target. Polukranous is a crazy mutate target, although it rarely lives that long. If it does, you have unlimited fight ability. Snapdax can only mutate on with the mana base, unless you have a Druid up. Still, too good to not include. Snapdax on a Starris is pretty fun.
The deck does have some issues with Fires, but the 4 Gemrazers help...but at best, just evens out the match, although I constantly feel at a disadvantage. Hush is an issue for the Lurrus decks, but not as big of an issue as I originally thought it would be. The lifggain works pretty well vs Cycling decks. Also the deck has some issues vs red at times, really depends on draws. Sometimes it is a cakewalk, others I get crushed.
Still, just fun to use mutate.