Lack

Sarkhan the Masterless

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature.
[+1]: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying.
[−3]: Create a 4/4 red Dragon creature token with flying.

Knight

Tezzeret, Betrayer of Flesh // Tezzeret, Betrayer of Flesh

Tezzeret, Betrayer of Flesh

The first activated ability of an artifact you activate each turn costs {2} less to activate.
[+1]: Draw two cards. Then discard two cards unless you discard an artifact card.
[−2]: Target artifact becomes an artifact creature. If it isn't a Vehicle, it has base power and toughness 4/4.
[−6]: You get an emblem with "Whenever an artifact you control becomes tapped, draw a card."