Red used to be almost completely unable to interact with spells or abilities on the stack, save for a couple of niche exceptions
While there is no one rule for determining land count, it's crucial to know where your average mana cost is and take it into account when deciding this
Serra Angel In the early days of Magic, a clean, powerful creature with no downside was a big deal, and Serra Angel was exactly that: a 4/4 flier for 5 mana that also has vigilance, meaning it can attack and still stay back on defense
The first of what appears to be several updates is an extended Standard set rotation, letting sets remain Standard playable for longer
For example, you may cast an artifact creature spell as your artifact spell and cast another artifact creature spell as your creature spell
Looting provides fodder for Grim Lavamancer and allows you to fill your graveyard with Ancient Grudges, Geistflames, Devils Plays, and Chandras Phoenixes