Pretty good, especially with stuff like vigilance or combat triggers
Each explores different versions of card advantage or selection
Four mana for a simple discard effect, even if it does pick away one for two mana each, is just not really usable anymore, not even in Limited
The Commander format is one of the most fun ways to play thanks to the massive deck size that encourages you to experiment with cards from all over MTG's history, by only allowing one of each card
Triggered abilities are abilities that start with "When", "Whenever", or "At", generally at the start of a paragraph on the permanent
That's almost game over for mono-red decks, and anything short on enchantment removal's going to have a tough time beating it