Sink your teeth into: Strionic Resonator, Exquisite Blood, Kambal, Consul of Allocation, Final Parting, Entomb, Syr Konrad, the Grim, Dreadhound
And with Ulalek on the board, they can be doubly potent - if you have the extra two mana of course
It may be included in any commander deck where the commander's color identity includes green
Or all the above
Legendary Artifact Enchantment Counters (CTRL to add secondary) Drain Drain (CTRL to add secondary) Draw Draw (CTRL to add secondary) Infect Fynn, the Fangbearer Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.) Whenever a creature you control with deathtouch deals combat damage to a player, that player gets two poison counters
Let's say you have a Spell Pierce in your hand