Pioneer

When Stromkirk Mentor enters the battlefield, put a +1/+1 counter on another target Vampire you control.

Skulk (This creature can't be blocked by creatures with greater power.) When Uninvited Geist deals combat damage to a player, transform it.

Whenever you cast an instant or sorcery spell, investigate. (Create a colorless Clue artifact token with "{2}, Sacrifice this artifact: Draw a card.")

Defender Thing in the Ice enters the battlefield with four ice counters on it. Whenever you cast an instant or sorcery spell, remove an ice counter...

Whenever you cast a noncreature spell, Cathar's Companion gains indestructible until end of turn. (Damage and effects that say "destroy" don't dest...

Stitched Mangler enters the battlefield tapped. When Stitched Mangler enters the battlefield, tap target creature an opponent controls. That creat...

Target opponent mills thirteen cards. {3}{U}{U}: Put Startled Awake from your graveyard onto the battlefield transformed. Activate only as a sorcery.

Silburlind Snapper can't attack unless you've cast a noncreature spell this turn.

Flying Whenever you investigate for the first time each turn, investigate an additional time.