Thassa, Deep-Dwelling Thassa, Deep-Dwelling is like a blue Teleportation Circle
Helitrooper is good, but so is Professor Hojo
The in-game story of Lorcana is a bit silly but it does help explain the game mechanics and how a battle as ridiculous as Mickey Mouse and Maleficent versus Tinkerbell and Maui could ever take place
He then becomes a 6/4 that, every time he does damage to a player, lets you draw two cards and play two spells that cost six mana or less for free
But ol' Niv is a great team player and will happily hop out of the command zone and join your 99, where it's often found in cEDH brews
Vorinclex / The Grand Evolution The new Vorinclex is a 5-mana 6/6 with trample and reach, and it tutors out some Forests and can flip for