Dominaria United Jumpstart, for example, is an awful product that should be avoided at all costs
As of my count, there are 8 different card types: land, creature, sorcery, instant, artifact, enchantment, planeswalker, and battle
Look for opportunities to add Locations to the board when you think they'll be safe , then protect them by forcing your opponent to exert their characters with Anna and Elsa, then either remove them with efficient challenging or keep them exerted with King of Hearts
Wither lets it permanently weaken opposing creatures, and its entry trigger spreads damage across the board to set up future kills
Animar, Soul of Elements was released in the very first set of Commander products back in 2011