Enchant land
Orcish Mine enters the battlefield with three ore counters on it.
At the beginning of your upkeep or whenever enchanted land becomes tapped, remove an ore counter from Orcish Mine.
When the last ore counter is removed from Orcish Mine, destroy enchanted land and Orcish Mine deals 2 damage to that land's controller.

At the beginning of each player's upkeep, Primal Order deals damage to that player equal to the number of nonbasic lands they control.

Reveal the top card of target opponent's library. If it's a land, you gain 1 life. Then that player shuffles their library.
Draw a card at the beginning of the next turn's upkeep.

Reach (This creature can block creatures with flying.)
Whenever Rashka the Slayer blocks one or more black creatures, Rashka gets +1/+2 until end of turn.

Whenever Reef Pirates deals damage to an opponent, that player mills a card.

As an additional cost to cast this spell, sacrifice a land.
Search your library for a basic land card and put that card onto the battlefield. Then shuffle your library.
Draw a card at the beginning of the next turn's upkeep.

Choose two target creatures an opponent controls. That player chooses and sacrifices one of those creatures. Put a -1/-1 counter on the other.

: Reveka, Wizard Savant deals 2 damage to any target and doesn't untap during your next untap step.

Whenever Root Spider blocks, it gets +1/+0 and gains first strike until end of turn.

Enchant creature without flying
When Roots enters the battlefield, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Flying
: Roterothopter gets +1/+0 until end of turn. Activate this ability no more than twice each turn.

Whenever Rysorian Badger attacks and isn't blocked, you may exile up to two target creature cards from defending player's graveyard. If you do, you gain 1 life for each card exiled this way and Rysorian Badger assigns no combat damage this turn.

, : Prevent the next 4 damage that would be dealt this turn to target creature you control. Tap that creature. It doesn't untap during your next untap step.

Flying, protection from red

: Regenerate Sea Troll. Activate this ability only if Sea Troll blocked or was blocked by a blue creature this turn.

When Sengir Autocrat enters the battlefield, create three 0/1 black Serf creature tokens.
When Sengir Autocrat leaves the battlefield, exile all Serf tokens.

Flying
Whenever a creature dealt damage by Sengir Bats this turn dies, put a +1/+1 counter on Sengir Bats.

Creatures with flying get +1/+1.

Enchant creature
At the beginning of your upkeep, sacrifice Serra Bestiary unless you pay .
Enchanted creature can't attack or block, and its activated abilities with in their costs can't be activated.

Whenever Serra Inquisitors blocks or becomes blocked by one or more black creatures, Serra Inquisitors gets +2/+0 until end of turn.