There are tons of extremely powerful effects that become even better when doubled up, like Portal to Phyrexia's ability to force your opponents to sacrifice three creatures when it comes into play, now forcing all your opponents to sacrifice six creatures instead
Theres a lot of extra work that goes into analyzing why and how counterspells work in Commander, and Im diving into at least a little bit of it today
I ended up with 39 slivers, which seems like plenty of the tribe while also leaving room for other good cards
This means you can snipe reanimation targets, embalm creatures, Prized Amalgams, or aftermath cards from your opponent's graveyard for just a single mana, which is quite strong
25 cards are priced from $0.37 to $4.84
Cast it on a later turn for its foretell cost.) Sorcery Mana sink (CTRL to add secondary) Ramp Boreas Charger Flying When this creature leaves the battlefield, choose an opponent who controls more lands than you