Boxing Day

Constellation — Whenever Doomwake Giant or another enchantment enters the battlefield under your control, creatures your opponents control get -1/-...

Flying, lifelink Heroic — Whenever you cast a spell that targets Dawnbringer Charioteers, put a +1/+1 counter on Dawnbringer Charioteers.

Flying When Spawn of Thraxes enters the battlefield, it deals damage to any target equal to the number of Mountains you control.

Heroes' Bane enters the battlefield with four +1/+1 counters on it. {2}{G}{G}: Put X +1/+1 counters on Heroes' Bane, where X is its power.

Flash If a source would deal damage to a permanent or player, it deals double that damage to that permanent or player instead.

When Scourge of Fleets enters the battlefield, return each creature your opponents control with toughness X or less to its owner's hand, where X is...

Flash At the beginning of each player's draw step, that player draws an additional card.

As Hall of Triumph enters the battlefield, choose a color. Creatures you control of the chosen color get +1/+1.

Constellation — Whenever Eidolon of Blossoms or another enchantment enters the battlefield under your control, draw a card.