Blood Artist

Whenever Blood Artist or another creature dies, target player loses 1 life and you gain 1 life.

Inkmoth Nexus

: Add .
: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It’s still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Spell Pierce

Counter target noncreature spell unless its controller pays .

Eternal Witness

When Eternal Witness enters the battlefield, you may return target card from your graveyard to your hand.

Pithing Needle

As Pithing Needle enters the battlefield, choose a card name.
Activated abilities of sources with the chosen name can’t be activated unless they’re mana abilities.