Perfect entry point into the expansion
Similarly, if a replacement effect has the Incarnation move to a different zone instead of being put into the graveyard, the ability won't trigger at all.
So you could potentially sacrifice Bloodsoaked Champion when you cast Korvold, and then next turn when Korvold attacks, put its attack trigger on the stack, activate the Champions raid ability to put it on the battlefield, then sacrifice it to Korvolds ability, and if you still had mana left over you could bring Champion back again the same turn
Note that Dauntless Dismantler really dismantles artifact aggro with that tap clause, in case thats ever a thing
Honorable Mentions: Thraben Inspector Toolcraft Exemplar Martyr of Sands Shahrazad Lin Sivvi, Defiant Hero Empyrial Armor Councils Judgment Gideon, Ally of Zendikar Cataclysm Yosei, the Morning Star