This straightforward, narrow sideboard tech had players worried about their decks being singled out, demanding emergency Commander bans, and bemoaning/gloating that Tron was finally dead (although that one happens during every spoiler season)
1 Nekusar, The Mindrazer Nekusar, the Mindrazer is a highly popular card in the Commander format, ranking #32 on EDHrec.com
Standard needs to be a place where players can play with new cards
The "Power Nine": Black Lotus, Mox Pearl, Mox Sapphire, Mox Jet, Mox Ruby, Mox Emerald, Ancestral Recall, Time Walk, and Timetwister
Most cards that look for a certain threshold of life gained check for 3 or 4 life, so this is right on the money
Shiftable characters provide you with a way to get stronger characters on the board for a cheaper cost while still having other low-cost characters in your deck that can pave the way for them