mtg gp oversized cards Oversize Card Sleeves 3.6 inch x 5.1 inch (91 mm x 130 mm), Fit for Plane Chase Cards, Dr. Who Commander Deck, Large Card Sleeves : Toys & Games Flying (This creature cant be blocked except by creatures with flying.) Avatar of Hope may block any number of creatures. The Grinder's Guide to Tournament

It shows you exactly what type of opening hand people kept and puts everyone but your own in-game knowledge in plain sight of the entire table (and you can hide the fact you may have kept a mediocre opener so they cant judge you, ahem)

You may play lands from among those cards for as long as they remain exiled

Genku, Future Shaper Genku, Future Shaper has a hard cap on its utility since you can only trigger it three times a turn, but thats plenty, assuming you can reliably trigger it all three times

Make sure to read the up to date oracle text, and remember that mana abilities cant be targeted, so youre not going to stop cards like Timeless Lotus or Mana Vault