Scrounge for Eternity AND Scout for Survivors Everyone loves Reanimation Spells especially ones that are cheap on the mana with restrictions like the power reducing and destroyable two-cost Animate Dead or the massive life loss of Reanimate
Having them on Agents Toolkit means they are harder to remove, as it's just an artifact
An example of this would be Yzma - Alchemist (The First Chapter Lorcana League/Organized Play Kit), with its card number (without a two-letter code) being 10/P1 - 1
The best Zombie commanders for tokens are Sidisi , Brood Tyrant , and Wilhelt , the Rotcleaver
Its magecraft ability will draw you a card, which helps keep your hand full so you never run out of steam
Laboratory Maniac is not strictly worse than Thassa's Oracle, seeing as some combos require you to have this card in play and draw cards later