After declaring attackers, you can impulse draw with cards like March of Reckless Joy, build up mana for a card like Leyline Tyrant, or use combat tricks like Lunar Frenzy
Understanding Instant-Speed Interaction in Commander In a 4-player Commander game, you take one turn for every three your opponents take
Its such a clean way to manipulate combat, especially in artifact-heavy decks, and they start stirring up trouble as early as turn 2
#10 Alhammarrets Archive Alhammarrets Archive is also intended for lifegain decks, although you could run it in a deck that benefits from drawing cards on your opponents turns
At the beginning of your end step, if you gained life this turn, create a Blood token
0: Put any number of land cards from your hand onto the battlefield tapped