Hall of Triumph

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

The Warmonger

Exile The Warmonger: Creatures you control get +2/+0 and gain haste until end of turn.

The Provider

Exile The Provider: Put two +1/+1 counters on target creature you control. You gain life equal to that creature’s toughness.

The General

Exile The General: Creatures you control get +1/+1 until end of turn. Untap them.

The Explorer

You may play an additional land on each of your turns.

The Savant

Exile The Savant: Tap all creatures your opponents control. Those creatures don’t untap during their controllers’ next untap steps.

The Vanquisher

Your starting hand size is increased by one.
Your maximum hand size is increased by one.

The Tyrant

Exile The Tyrant: Creatures your opponents control get -1/-1 until end of turn.

The Warrior

: Target creature you control gains haste until end of turn.

The Hunter

: Target creature you control gets +1/+1 until end of turn.

The Protector

: Prevent the next 1 damage that would be dealt to any target this turn.

The Slayer

You start the game with an additional 7 life.

The Avenger

, : Target creature you control gains deathtouch until end of turn.

Lay of the Land

Search your library for a basic land card, reveal it, put it into your hand, then shuffle your library.

Doubling Season

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.

Incremental Growth

Put a +1/+1 counter on target creature, two +1/+1 counters on another target creature, and three +1/+1 counters on a third target creature.

Worm Harvest

Create a 1/1 black and green Worm creature token for each land card in your graveyard.
Retrace (You may cast this card from your graveyard by discarding a land card in addition to paying its other costs.)

Oblivion Ring

When Oblivion Ring enters the battlefield, exile another target nonland permanent.
When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner’s control.

Land Tax

At the beginning of your upkeep, if an opponent controls more lands than you, you may search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle your library.

Interplanar Tunnel

When you encounter Interplanar Tunnel, reveal cards from the top of your planar deck until you reveal five plane cards. Put a plane card from among them on top of your planar deck, then put the rest of the revealed cards on the bottom in a random order. (Then planeswalk away from this phenomenon.)

Oblivion Ring

When Oblivion Ring enters the battlefield, exile another target nonland permanent.
When Oblivion Ring leaves the battlefield, return the exiled card to the battlefield under its owner’s control.

Doubling Season

If an effect would create one or more tokens under your control, it creates twice that many of those tokens instead.
If an effect would put one or more counters on a permanent you control, it puts twice that many of those counters on that permanent instead.