mtg discard cards o:"discard ~:" · Scryfall Magic: The Gathering Search Rules Text: Each player discards,

The reason Shorikai needs the can be your commander text is that its not natively a creature, something folks might gloss over because it has a power and toughness prominently displayed

1 Dark Ritual

The additional 2 damage is dealt by the same source as the original source of damage

You'll get that same butt-clenching sensation when you look at the showcase foil's price tag

This time you put the cards into exile, meaning you cant get them with your Mnemonic Deluge but as long as Jacob sticks around you get to flip him into an impulse draw effect

Rarity can solve a lot of problems you might have in limited already so that is probably fine