The first determines how much damage your character deals in a challenge, and the second tells you how much damage they can take before they're banished
It could even be because you got to the end of your turn and had too many cards in your hand
In Commander, you might go higher because you have 100 cards and you need enough sources to fuel all your other spells
2021-07-23 If an opponent gains control of one of your creatures, that creature phases out, and the duration of the control-change effect expires before it phases back in, that creature phases in under your control as that opponent's next untap step begins
Again, no plans to share, but there is likely an opportunity to have a release that has a narrower focus on the player it appeals to as a way to experiment and see how players react
Scarlet & Violet 151 has 207 cards in total (165 main set cards plus 42 Secret Rares)