+"Overlord" (12)
Flying
When Abhorrent Overlord enters the battlefield, create a number of 1/1 black Harpy creature tokens with flying equal to your devotion to black. (Each in the mana costs of permanents you control counts toward your devotion to black.)
At the beginning of your upkeep, sacrifice a creature.
Sacrifice a creature: Regenerate Cateran Overlord.
, : Search your library for a Mercenary permanent card with mana value 6 or less, put it onto the battlefield, then shuffle.
Double strike
Magecraft — Whenever you cast or copy an instant or sorcery spell, return target nonlegendary creature card from your graveyard to your hand.
Flying, trample, haste
: Hellkite Overlord gets +1/+0 until end of turn.
: Regenerate Hellkite Overlord.
Flash
At the beginning of your upkeep, for each creature you control that's a Wolf or a Werewolf, create a 2/2 green Wolf creature token.
First strike
Other Kobold creatures you control have first strike.
Assist (Another player can pay up to of this spell's cost.)
When Lava-Field Overlord enters the battlefield, it deals 4 damage to target creature an opponent controls.
Relentless March — , , Tap X untapped artifacts you control: Target opponent loses X life.
Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
Whenever Nefarox, Overlord of Grixis attacks alone, defending player sacrifices a creature.
Other Kobolds you control get +2/+2.
Whenever you cast a Kobold spell, you may pay . If you do, create a 4/4 red Dragon creature token with flying.
Whenever you cast a Dragon spell, create a 0/1 red Kobold creature token named Kobolds of Kher Keep.
: Search your library for a Sliver card, reveal that card, put it into your hand, then shuffle.
: Gain control of target Sliver. (This effect lasts indefinitely.)
Whenever a Wolf or Werewolf you control deals combat damage to a player, draw a card.
At the beginning of your upkeep, if you control three or more Wolves and/or Werewolves, it becomes night. Then transform any number of Human Werewolves you control.
Daybound
Gatherer works better in the Companion app!
. If you do, create a 4/4 red Dragon creature token with flying.