Spell Crumple This made-for-Commander card (along with Hinder, which came out all the way back in Champions of Kamigawa), led to the 2015 change in the somewhat-still-contentious tuck rule
Yshtola will recover your life which you can then pay to bolster your battlefield with more tokens
That said, if you need marked cards for any of your work, that you don't want to baby and keep in pristine condition, THESE are the cards to get by the brick
Beyond her popularity as a Final Fantasy character, Yshtola is remarkably powerful in Commander, influencing price spikes on cards like Ophidian Eye, Helm of the Ghastlord, and Snuff Out recently
This rule has thankfully since been removed
Impulse Impulse may not be the strongest card around, especially since it doesnt give you any card advantage, but it shines in combo strategies that require you to find key pieces to win the game or put you ahead