Neheb, the Eternal

Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.)
At the beginning of each of your postcombat main phases, add {R} for each 1 life your opponents have lost this turn.

Viashino Grappler

{G}: This creature gains trample until end of turn.

Viashivan Dragon

Flying
{R}: This creature gets +1/+0 until end of turn.
{G}: This creature gets +0/+1 until end of turn.

Yurlok of Scorch Thrash

Vigilance
A player losing unspent mana causes that player to lose that much life.
{1}, {T}: Each player adds {B}{R}{G}.