If you get to cast an instant or sorcery from the spell you exile on top of your library, you can then trigger her second ability, allowing you to copy that spell, or the second spell that should still be on the stack at this point
Skills a strong commander should have: they should be cost efficient / cheap and/or easy to cast they should have good stats for their costs they should have as many good effects as possible they shouldn't have any ot to many downsides they should have a high/good coloridentidy they can break parity in some kind of way they have inpact as soon as they enter the board (either they have haste, or a good ETB- or static-Effect or they have triggered ability) Commanders from Tier 0 to Tier 4 are commander who can be easily broken with specific cards
It does cost one mana, and it can eventually grant double strike, but that's stretching all sorts of boundaries and definitions
Green | Tendershoot Dryad Honorable Mention: Scute Swarm Green is probably one of the colors with the most access to token generators in MTG, so the best card in this category carries a lot of weight
WHISPERS IN THS WELL SINGLE-PLAYER DECK: AMBER & EMERALD SIMBA & MEGARA
The Chain Veil is obviously the most important here, giving you double activations to further accelerate ultimate abilities