Enlistment Officer
3W
Creature - Soldier
2/3
First strike
When Enlistment Officer comes into play, reveal the top four cards of your library. Put all Soldier cards revealed this way into your hand and the rest on the bottom of your library.
Tidal Courier
3U
Creature - Merfolk
1/2
When Tidal Courier comes into play, reveal the top four cards of your library. Put all merfolk cards revealed this way into your hand and the rest on the bottom of the library.
<3U>: Tidal Courier gains flying until end of turn.
Grave Defiler
3B
Creature - Zombie
2/1
When Grave Defiler comes into play, reveal the top four cards of your library. Put all Zombie cards revealed this way into your hand and the rest on the bottom of your library.
<1B>: Regenerate Grave Defiler.
Goblin Ringleader
3R
Creature - Goblin
2/2
Haste
When Goblin Ringleader comes into play, reveal the top four cards of your library. Put all goblin cards revealed this way into your hand and the rest on the bottom of your library.
Kavu Howler
4GG
Creature - Kavu
4/5
When Kavu Howler comes into play, reveal the top four cards of your library. Put all Kavu cards revealed this way into your hand and the rest on the bottom of your library.
Sylvan Messenger
3G
Creature - Elf
2/2
Trample
When Sylvan Messenger comes into play, reveal the top four cards of your library. Put all Elf cards revealed this way into your hand and the rest on the bottom of your library in any order.
Note that Goblin Ringleader was previously rumored to cost 2R, which would've made him directly suprior to Goblin Chariot.
With Enlistment Officer one could think that Soldiers might get a Lord soon.