Planeswalker decks are already quite strong once they are able to get going (see Atraxa, Praetor's VoiceAtraxa, Praetor's Voice for that), and once we get extra time thanks to Pramikon, we will be able to snowball out of control quickly, especially with planeswalkers like Chandra, Awakened InfernoChandra, Awakened Inferno, Elspeth, Sun's ChampionElspeth, Sun's Champion, and both Will KenrithWill Kenrith and Rowan KenrithRowan Kenrith at our disposal
I'll use the lowest price you buy each card for versus the market price, so you'll have a clear idea of the actual value
You may cast a spell for its prowl cost if a rogue or sometimes tribal creature like goblin or faerie has dealt combat damage to an opponent
Doubling the number of counters put on any of the permanent types it mentions is a straight up strong effect
The biggest contributors to this are the more interesting and distinctive support cards Wizards has been releasing in the past couple of years
For example, say an artifact causes your opponent to exile their hand of three cards face down