Senu, Keen-Eyed Protector Senu, Keen-Eyed Protector is a two-cost (one generic and one white) legendary creature with Flying and Vigilance
You may alternately cast spells with prowl if a rogue or creature that shares a creature type of the prowl card has dealt combat damage to an opponent
Runaway Steam-Kin is a two-mana elemental creature that gets a +1/+1 counter each time you cast a red spell, and you can remove three +1/+1 counters to generate three red mana, making it good for any mono-red Commander deck
Harmonic Sliver Harmonic Sliver turns all of your slivers into removal
That's why they've created three versions of The Soul Stone- including a ridiculously rare variant with just art and no text, so you can tell your pod it does whatever you want
Vehicles not only help you tap Rip to trigger survival, but they also benefit from the different power clauses, as many vehicles have unique power and toughness stats