Once Vaultborn Tyrant's second ability has triggered, lowering the power of the creature or removing it from the battlefield won't stop you from gaining life and drawing a card
These are genuinely rare and highly collectible
Cards like Hylda of the Icy Crown and Sharae of Numbing Depths can reward you for choosing this sub-optimal control effect over just straight-up Murder and Path to Exile
Thickness of 1 Side (microns): Dragon Shield Perfect Fit (60), Ultra Pro Eclipse Matte (105) 100 Double Sleeved Card Thickness (mm): Theoretical (63), Practical (66) Water Test: Pass Deck Box Fit (mm storage): Fit: 100 good
With the Slowpokes and Drowzee being weak to psychic they take double damage if they lose the coin flip resulting in KO'ing the base set Slowpoke and taking Drowzee and fossil Slowpoke to 10 HP
When it ETBs, you're going to get one creature out of eight cards (four of yours and four of your opponent), and because of your deck restriction it's pretty positive that you'll get a free creature out of the deal