These spoiled cards provided by an anonymous source.
Bonds of Faith1W
Enchantment - Aura (C)
Enchanted creature gets +2/+2 as long as it's a Human. Otherwise, it can't attack or block.
Illus. Steve Argyle
Creature - Human Soldier (C)
When Doomed Traveler dies, put a 1/1 white Spirit creature token with flying onto the battlefield.
Illus. Lars Grant-West
Rally the Peasants2W
Creatures you control get +2/+0 until end of turn.
Illus. Jaime Jones
Enchantment - Aura (U)
Whenever enchanted creature deals damage to an opponent, you may draw a card.
Illus. Igor Kieryluk
Delver of SecretsU
Creature - Human Wizard (C)
At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery is revealed this way, transform Delver of Secrets.
//////////// Insectile Aberration
Creature - Human Insect
Illus. Nils Hamm
There we have a neat little Limited combo: Invisible Stalker + Curiosity.
Bonds of Faith is also really nice. Pacifism with an upside (or downside, depending on how many Humans will be present in Limited). Still, it will always be useful as creatures you wanna remove tend to be bigger anyway.