Oasis Ritualist is good because I can tap for any color land, which is great for this deck
Ammit Eternal is good because its a 5/5 for 3. I can use bolas,
torment of hailfire, and
torment of scarabs to make my opponent sacrifice creatures and then attack with
Ammit Eternal which they wouldn't be able to block unless they had a sorcery/instant/enchantment. Once the combat damage is dealt to my opponent I can remove all -1/-1 counters on it. Since I need to stall my opponent to get Bolas out, I can use this guy to block, which deals 3 damage to my opponent because of
afflictDreamstealer is good because it has menace which makes it harder to block and therefore easier to deal combat damage to my opponent. When my opponent discards a card it leaves fewer options for my opponent when I use Bolas' +3 ability. i.e. If they discard their last card in hand and then I use bolas' +3 ability; they HAVE to sacrifice a creature or take 3 damage. Eternalize is also great because I can make a copy of it for 6 mana. Then it becomes an excellent blocker (4/4) and if I deal combat damage to my opponent they have to discard 4 cards instead of 1.
what if I played 3 copies of
Oasis Ritualist and 3 copies of
Ammit Eternal and 2 copies of
Dreamstealer