If I recall there are four, the Piracy first, Reconnaissance Mission with cycling, the Bident above that can be tapped with two mana on an opposing turn to force them to attack and then the recently printed Vehicle called The Indomitable
So far weve seen a Scar made from lava, a Hades that rules atop Mount Olympus, and a giant Tinker Bell three-stories tall
The third mode just sets you up for future big plays, and youll only use it if you have a sizeable force going at the opponent
With all that said, what exactly are the cards that are rising to the top when it comes to card value
Sundial of the Infinites activated ability skips straight to the cleanup step, exiling whatevers on the stack, removing all creatures from combat, and otherwise disrupting normal gameplay