Landfall — Whenever a land you control enters, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")Whenever you sacrifice a Clue, put a +1/+1 counter on Tireless Tracker.
Flash (You may cast this spell any time you could cast an instant.)FlyingWhenever Nebelgast Herald or another Spirit you control enters, tap target creature an opponent controls.
Create two 2/2 black Zombie creature tokens.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
Return target instant or sorcery card from your graveyard to your hand.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
At the beginning of each player's upkeep, if that player has no cards in hand, you draw a card and you lose 1 life.Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)
Put two +1/+1 counters on target creature. It gains vigilance, trample, lifelink, indestructible, and haste until end of turn.Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)
Whenever Archghoul of Thraben or another Zombie you control dies, look at the top card of your library. If it's a Zombie card, you may reveal it and put it into your hand. If you don't put the card into your hand, you may put it into your graveyard.