Some key considerations include rarity, condition, and demand for a particular card
Instead, Hooded Blightfang destroys my blocker by dealing it just 1 damage
White-black bats benefit from both gaining and, counterintuitively, losing life
In terms of who should lead the precon, Frodo and Sam have a huge advantage: as we highlighted earlier, the deck is primarily a Food (18 cards) and Lifegain deck (19 cards), and Frodo + Sam are simply the best suited to lead that style of deck
A big issue effecting the slower control builds using Sigil of the Empty Throne, Elephant Grass and Solitary Confinement, is that you have very limited card quality and ramp in enchantment form
This card is so good that it's sure to see more play in Standard before it rotates, so keep an eye out for it there as well