This octopus advisor is well suited to lead a lifegain matters deck, with cards like Ajani's Pridemate that get a little better each time you draw a card, or cards like Vito, Thorn of the Dusk Rose that enhance your draining abilities
(2021-03-19) If a card with flashback is put into your graveyard during your turn, you can cast it if it's legal to do so before any other player can take any actions
Instants/Sorceries Matter Wizards of the Coasts (WotCs) designs have supported the spellslinger archetype well, and while youll want a bunch of instants and sorcery spells to get your Gandalf triggers, youll also want some other cards that pay you for playing those spells too
Just look at Smugglers Copter or Reckoner Bankbuster
But even considering that, milling three and maybe getting one of them back depending on your hits is just a really weak payoff
My favorite move is to cast a criminal instant on the opponents draw step, then flash back a discard spell like Thoughtseize before they have a chance to cast what they drew