Courser of Kruphix +
Tireless Tracker +
Windswept Heath +
Prismatic Vista
As long as the top card of the library is a land,
Courser of Kruphix can play it straight off the top of the deck. This can result in a free card every turn, and helps to ensure that lands are being played frequently for
Tireless Tracker's effect. Tokens from
Tireless Tracker can then draw non-land cards to potentially reveal lands underneath for
Courser of Kruphix. Aside from providing two Clue tokens per card,
Windswept Heath and
Prismatic Vista can also be used to shuffle away unwanted cards from the top of the deck. Sacrificing
Windswept Heath,
Prismatic Vista, and
Tireless Tracker tokens can all activate Revolt for
Fatal Push.
Vraska, Golgari Queen
These can be used in conjunction with the above cards to help with card draw.
Vraska, Golgari Queen can target Clue tokens from
Tireless Tracker with her +2 to draw a card and gain Loyalty. This can help to dig through the deck, and still gives
Tireless Tracker a +1/+1 counter.
Vraska, Golgari Queen can also target lands when flooded, or
Birds of Paradise if they're not needed. Again, these tactics can help to locate top-deck lands for
Courser of Kruphix when desired, and also trigger revolt for
Fatal Push.
Grim Flayer
Getting a hit through with this card lets you play around with the top of your library to ensure you draw into what you need. It also puts creatures in the graveyard for
Scavenging Ooze.
Warden of the First Tree
The Warden can be played differently depending on the situation. It can be an early chump blocker or removal bait, and can also be a game-ender later on. Its abilities can be played at instant-speed, so you can activate it at the end of the opponent's turn if you didn't need spend mana for removal. The final ability can be used multiple times to help punch through strong defences.
Hexdrinker
This card can also be used as an early blocker or a late-game powerhouse. Protection from instants can save it from removal, and the 4/4 body is decent as well.