Gala Greeters

Alliance — Whenever another creature you control enters, 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.

Elas il-Kor, Sadistic Pilgrim

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

Eternal Witness

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

Doran, the Siege Tower

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

Meekstone

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