Izzet Phoenix needs its graveyard to cheat back Arclight Phoenix and to fuel Treasure Cruise, so Unlicensed Hearse is excellent both as graveyard disruption and as another Vehicle target for Greasefang, Okiba Boss. Duress takes away Into the Flood Maw or Lightning Axe before they can disrupt our board. Collective Brutality's discard mode is weak since they run few bombs to strip, and Cache Grab is too slow against a deck trying to combo off multiple spells per turn.