Defender
At the beginning of your upkeep, scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Reach (This creature can block creatures with flying.)

Zombies you control have menace. (They can't be blocked except by two or more creatures.)
, Exile a creature card from your graveyard: Create a 2/2 black Zombie creature token.

Gain control of target Equipment, then create a 0/0 black Germ creature token and attach that Equipment to it.

Exploit (When this creature enters the battlefield, you may sacrifice a creature.)
When Gurmag Drowner exploits a creature, look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard.

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

When Haunted Dead enters the battlefield, create a 1/1 white Spirit creature token with flying.
, Discard two cards: Return Haunted Dead from your graveyard to the battlefield tapped.

Rally — Whenever Hero of Goma Fada or another Ally enters the battlefield under your control, creatures you control gain indestructible until end of turn.

Flying
Hinterland Drake can't block artifact creatures.

Choose one —
• Counter target spell if it's red.
• Destroy target permanent if it's red.

Whenever a creature enters the battlefield under your control, Impact Tremors deals 1 damage to each opponent.

, , Sacrifice Ixalli's Keeper: Target creature gets +5/+5 and gains trample until end of turn.

As Kindred Discovery enters the battlefield, choose a creature type.
Whenever a creature you control of the chosen type enters the battlefield or attacks, draw a card.

, : Untap another target artifact.
, : Target creature can't be blocked this turn.

Return any number of target Ally creature cards with total converted mana cost 8 or less from your graveyard to the battlefield.

Flying
Whenever you cast an instant or sorcery spell, Mercurial Geists gets +3/+0 until end of turn.

When Meteor Golem enters the battlefield, destroy target nonland permanent an opponent controls.

At the beginning of combat on your turn, target creature you control gains indestructible until end of turn.
: Nahiri's Machinations deals 1 damage to target blocking creature.

Flying
Cycling (, Discard this card: Draw a card.)
Embalm (, Exile this card from your graveyard: Create a token that's a copy of it, except it's a white Zombie Bird Soldier with no mana cost. Embalm only as a sorcery.)

Enchant creature
When Pious Interdiction enters the battlefield, you gain 2 life.
Enchanted creature can't attack or block.