Even without getting to deal 10,000 damage, taking one more removal spell from an opponent's hand is still a useful benefit
You technically can put multiple regeneration effects on a permanent at once, but the multiple effects serve no real purpose and will all go away the next time the permanent would be destroyed that turn
The Ninja strikes from the shadows, disrupting your opponent's game plan by making one of their combatants - poof
Return to the Ranks 4/10 The better your deck the better this is as you will have a nice high density of the premium one and two drop synergy cards
Parhelion II It's no surprise that many players, upon learning about this new rule change, flocked to the idea of making Parhelion II their Vehicle commander
Also, Liliana is a reminder that planeswalkers are often defined by what they do turn after turn