Lifelink, protection from white and from black As long as you have 30 or more life and an opponent has 10 or less life, Blood Baron of Vizkopa gets +6/+6 and has flying.
{T}: Blood Cultist deals 1 damage to target creature. Whenever a creature dealt damage by Blood Cultist this turn dies, put a +1/+1 counter on Blood Cultist.
When Blood Spatter Analysis enters, it deals 3 damage to target creature an opponent controls. Whenever one or more creatures die, mill a card and put a bloodstain counter on Blood Spatter Analysis. Then sacrifice it if it has five or more bloodstain counters on it. When you do, return target creature card from your graveyard to your hand.
Flying, trample At the beginning of your upkeep, each player loses 1 life. Put a +1/+1 counter on Blood Tyrant for each 1 life lost this way. Whenever a player loses the game, put five +1/+1 counters on Blood Tyrant.
This spell costs {1} less to cast for each creature that died this turn. Discard your hand, then draw eight cards. Blood for the Blood God! deals 8 damage to each opponent. Exile Blood for the Blood God!
This spell costs {1} less to cast for each 1 life your opponents have lost this turn. Target opponent exiles the top three cards of their library. Until the end of your next turn, you may play those cards. If you cast a spell this way, mana of any type can be spent to cast it.
When Bloodtithe Harvester enters, create a Blood token. {T}, Sacrifice Bloodtithe Harvester: Target creature gets -X/-X until end of turn, where X is twice the number of Blood tokens you control. Activate only as a sorcery.
Partner with Owen Grady, Raptor Trainer For each kind of counter on Blue, Loyal Raptor, each other Dinosaur you control enters with a counter of that kind on it.
Whenever you sacrifice another creature, put a +1/+1 counter on Body Dropper. {B}{R}, Sacrifice another creature: Body Dropper gains menace until end of turn.