The full breakdown of how Songs interact with these archetypes is in the Songs mechanic guide (linked below in Related Reading), worth reading if Amber-heavy decks are your lane
Card Draw With access to blue mana, Dimir has no problem casting Factor or Fiction , Deep Analysis , or the dreaded Rhystic Study , while black provides Phyrexian Arena , Night's Whisper , and Necropotence
No one gets to 30 life in Modern who hasnt already won
If a creature card was discarded this way, draw two cards instead
Even if Magda is not your Commander, and even if your deck is not focused around Dwarves, Magda is still strong enough in Commander decks that care about Treasures
But the fun of a card game is that each player has secret information, the cards in their hand