Perhaps slightly more likely is the possibility that Phyrexian Crusader finds a home in the B/G Legacy Infect deck that uses Invigorate, Berserk, and various pumps spells to go for a quick kill
Most instances of either gating condition are on activated abilities (most of which don't cost mana and therefore need a limiting condition), neatly solving the issue I'm about to mention, but consider this example: We're playing Innistrad Crimson Vow draft
Rokket Tracer TypeTuner/Effect Monster Collector NumberMGED-EN020 RarityPremium Gold Rare Market price $0.38 Based on the latest market prices tracked on TCG Stacked
Samwise the Stouthearted + Ratadrabik of Urborg + Ashnod's Altar or Viscera Seer You need all three permanents in play
Theres a non-zero chance, in fact, you can just one-hit-kill an opponent immediately
It also sets up a dangerous precedent