Hangarback Walker enters with X +1/+1 counters on it.
When Hangarback Walker dies, create a 1/1 colorless Thopter artifact creature token with flying for each +1/+1 counter on Hangarback Walker.
, : Put a +1/+1 counter on Hangarback Walker.

Flying
Whenever another Spirit you control enters, Mausoleum Wanderer gets +1/+1 until end of turn.
Sacrifice Mausoleum Wanderer: Counter target instant or sorcery spell unless its controller pays , where X is Mausoleum Wanderer's power.

Return each creature card with mana value X or less from your graveyard to the battlefield. Exile those creatures at the beginning of your next upkeep. Exile Rally the Ancestors.

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.

First strike
Whenever Alesha, Who Smiles at Death attacks, you may pay . If you do, return target creature card with power 2 or less from your graveyard to the battlefield tapped and attacking.

If an opponent would gain life, that player loses that much life instead.

This spell can't be countered.
Choose a nonland card name. Search target opponent's graveyard, hand, and library for any number of cards with that name and exile them. Then that player shuffles.

Trample
When Siege Rhino enters, each opponent loses 3 life and you gain 3 life.

This spell can't be countered.
Destroy all creatures.