As long as a commander handles at least one of the above elements, they have potential as a sacrifice commander
Things quickly add up to about 40 products per year
I don't think Skyclave Rel-ic is the next Jace, the Mind Sculptor, but I do think it will be a mainstay of the young Gladiator format
You can look at the top card of your library, and if its an artifact or colorless spell, you can cast it
Here's a snapshot from TCGplayer, capturing the three most valuable out the gate: As you can see, one can potentially open a $400+ card from a collector booster if they're lucky enough
Iconic Cards: Counterspell, Ponder, Damnation, Jace, the Mind Sculptor Popular Decks: UW Control, Jeskai Control, Taking Turns, Esper Control 3 Midrange Midrange decks are popularly said to solve problems, not create them. In other words, these decks are sort of designed to be able to win against every archetype, although they wont bulldoze over anything (the way aggro often wrecks control, for example)