Your opponent definitely wont get the last word as Edgar boosts all of your vamps and just makes more of them when it taps out for a bit to get some rest before returning to end it all
This is just with vanilla creatures that don't have any other effects
Aggressive Play Incentive: She's the only investigator to actually benefit from being attacked, which encourages her to go into offensive rather than hide behind: She can either immediately retaliate and deal 1 damage to attacking enemy, or automatically evade them (which either exhausts them, or triggers other effects)
Whenever one of your non-token creatures dies, you put a +1/+1 counter on a creature and goad it
Some cards, like Mycosynth Golem and Tezzeret, Master of the Bridge, can give affinity to spells that already have affinity
Against another blue deck, it often costs just 1 mana to counter a key spell, so its perfect in Izzet Murktide or control lists that try to tempo out their opponent