For Hedron crab, the target is a single player - but Ruin crab targets each opposing player
Solgaleo 186 Lunala ex Psychic 180 Lunar Blast (100) Psychic Connect (Ability) Once during your turn, you may move all psychic energy from 1 of your benched psychic Pokmon to your active Pokmon
Effects from that attack are then activated and damage may be dealt on the defending Pokmon, which may modify based on the defender Pokmon's type weakness or a resistance policies, and/or by any other effects on the defending Pokmon
Then this can tap with three mana to make a 1/1 colorless artifact dork with toxic one that cannot block
To go other routes for draw, I would consider including Grothama, All-Devouring to attack/fight/"sac" a bunch of "excess" creatures for draw, or Skullmulcher does similar in a pure sac way, or perhaps Ohran Frostfang, Regal Force, Toski, Bearer of Secrets, Benefactor's Draught, Mind's Eye, War Room, and while Nissa, Voice of Zendikar is off the Elf theme, it's still effective for more than draw
If the spell has any mandatory additional costs, those must be paid to cast it
