Rhystic Study In theory, its possible that [c]Rhystic Study[/c] never draws you a card in a game of Magic, but then your opponents are greatly limiting their plays
Exiling it and preventing it from attacking are among the few ways to permanently shut down Zetalpa and if your opponent doesnt have them at the ready youll quickly take over the game
Rune-Tail, Kitsune Ascendant will generally flip immediately when you play it (especially considering a lot of attacks coming your way may be directed to your Planeswalkers instead of your life total), so it will make your creatures very resilient blockers, particularly Wall of Glare
Alongside Winter and the Speed Demon are a whole host of possessed survivors, glitch ghosts, razorkin, and other creatures of Duskmourn
Artifacts are colorless most of the time, which means they don't need to be summoned by a particular mana type
Sometimes you need to beat Infect by choosing decks that are just plain good in the matchup