Delighted Halfling can make your commander uncounterable
In many peoples eyes, this red creature invalidated creature-based decks, being able to pick off a full board relatively easily, while leaving behind a 3/3 double striker to quickly end the game with yourself
While its Daybound form is a 2/2, its Nightbound form grows into a 3/3, retaining this mana ramp ability whilst also providing all other werewolves and wolves with +1/+1
Creature 4Masticore 4Metalworker 1Phyrexian Colossus Artifact 1Crumbling Sanctuary 4Grim Monolith 4Phyrexian Processor 4Tangle Wire 4Thran Dynamo 4Voltaic Key Sorcery 4Tinker Instant Land 4Crystal Vein 9Island 4Rishadan Port 4Saprazzan Skerry Sideboard 4Annul 4Chill 4Miscalculation 2Rising Waters 2001 was the year of Fires of Yavimaya decks, but in the end it was Tom van de Logt taking it all down with his version of Machine Head, a red-black aggressive deck featuring Dark Ritual
Remember, this can be done before Thassa's Oracle enters play, or as late as when the ability from Oracle is on the stack