Back in the day, it came about because I was trying to "fix" a problem card, in this case, one of the most notorious cards of all time: Necropotence was a card so broken that it warped Standard for well over a year, creating a time colloquially known as Necro Summer
In addition to the well-positioned maindeck, it had access to all the great sideboard cards white has to offer: Rest in Peace, Stony Silence, Timely Reinforcements, Kataki, etc
7 Meekstone An artifact for only a single mana, Meekstone prevents creatures with power three or greater from untapping during their controllers' untap steps
With Rush, this card can challenge the same turn its been played, which can come in handy if the game is looking dicey
Or Any Zone Other Than My Hand
Rampaging Soulrager Rarity: Common TYPE: Creature SUBTYPE: Spirit CMC: 3 Mana cost: USD: $0.02 EUR: 0.02 TIX: 0.03 EDHREC RANK: 23880 (1/4) This creature gets +3/+0 as long as there are two or more unlocked doors among Rooms you control