msem-instigator

Enchant land
Whenever enchanted land is tapped for mana, its controller adds two mana in any combination of colors (in addition to the mana the land produces.)

When Blessed Spellroot dies, you gain 5 life.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)
Enchanted creature gets +1/+3.
Whenever enchanted creature attacks, you gain 1 life.

Enchant creature
Enchanted creature gets +3/+3 and has “{G}: Regenerate this creature.”

Enchant land (Target a land as you cast this. This card enters the battlefield attached to that land.)
Enchanted land has “{T}: Add one mana of any color” and “At the beginning of each upkeep, untap this land.”

When Blightbringer enters the battlefield, creatures your opponents control get -1/-1 until end of turn.
Unearth {3}{B} ({3}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

{1}{B}, {T}: Target creature gets +2/+2 and gains winnow until end of turn. (Damage dealt to it also causes its controller to lose that much life.)
{3}{B}{B}, {T}: Target creature gets -2/-2 and gains winnow until end of turn.

Whenever one or more creatures attack you, you may put a -1/-1 counter on target creature.

When Blighting Ooze enters the battlefield, put a -1/-1 counter on each of up to X target creatures.
As long as Blighting Ooze is on the battlefield, it has all activated abilities of each creature with a -1/-1 counter on it.

Prowess

Enchant creature
Enchanted creature gets +1/+1 and has hexproof.

Sacrifice another creature: Blood Bairn gets +2/+2 until end of turn.

Whenever an attacking creature you or a teammate controls dies, you lose 1 life and draw a card.

As an additional cost to cast this spell, sacrifice any number of creatures.
Target player loses 2 life for each creature sacrificed to cast Blood Lashing.

Engorge (As this enters the battlefield, mill three cards, then exile a card from among the milled cards.)
When Blood Servant enters the battlefield, if it engorged a creature card, you draw a card and you lose 2 life.

{1}{B}, Sacrifice another creature, Discard two cards: Search your library for a card, put that card into your hand, then shuffle.

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Blood-Tithe Harpy enters the battlefield, target player loses 1 life and you gain 1 life.

Whenever you sacrifice a creature, you may pay {B}{G}. If you do, put a +1/+1 counter on Bloodblade Mercenary and draw a card.

Engorge (As this enters the battlefield, mill three cards, then exile a card from among the milled cards.)
When Bloodchill Risen enters the battlefield, if it engorged an instant card, return target creature to its owner's hand.

Whenever Bloodcrazed Instigator attacks, target Rebel creature you control gains first strike until end of turn.

Haste
When Bloodfury Warlord enters the battlefield or dies, it deals 2 damage to each player.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Bloodied Twinblade dies, scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Frenzy 1 (Whenever this creature attacks and isn't blocked, it gets +1/+0 until end of turn.)

Flying
{1}, Sacrifice another creature: Regenerate target Vampire.

This spell costs {1} less to cast for each creature that attacked this turn.