Eternal Witness

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

Meekstone

Creatures with power 3 or greater don't untap during their controllers' untap steps.

Gala Greeters

Alliance — Whenever another creature enters the battlefield under your control, choose one that hasn't been chosen this turn —
• Put a +1/+1 counter on Gala Greeters.
• Create a tapped Treasure token.
• You gain 2 life.

Doran, the Siege Tower

Each creature assigns combat damage equal to its toughness rather than its power.

Elas il-Kor, Sadistic Pilgrim

Deathtouch
Whenever another creature enters the battlefield under your control, you gain 1 life.
Whenever another creature you control dies, each opponent loses 1 life.