You can't use Tenacious Tomeseeker's ability to return an adventurer card from your graveyard to your hand
Landfall wise, you could lean into more land drops and ways to make mana
Ashiok, Nightmare Weaver can do three at a time, Ulamog, the Ceaseless Hunger can exile 20 cards at once and Ulamog, the Defiler exiles the top half of an opponent's library
First, there's a new mechanic called Sneak, which is a riff on the pre-existing Ninjutsu, in which players can cheat big creatures onto the battlefield whenever an attacking creature goes unblocked
This creature gains +1/+1 and grants you 1 life anytime another creature you control dies or is put into exile
Let's look at the entries for this new set