You have a reasonable likelihood of it sacrificing itself before you get to two 5/5s, and potentially before you get to draw any cards
They also have, Whenever you cast a spell with X in its mana cost, create a 0/0 green Hydra creature token, then put X +1/+1 counters on it. That means that youll be generating an extra Hydra for nearly every Hydra you cast
However, both decks come with their own ways to increase lore in efficient ways
And the deck isn't even technically an Elf deck, but with 12 one drop mana making Elves, plus 4 Priests, and 4 Circles, you have 20 Elves that tap for mana, then flesh out your deck otherwise
Instant Color tag templates(None) Personal Tutor Search your library for a sorcery card, reveal it, then shuffle and put that card on top