Mana Leak

Counter target spell unless its controller pays {3}.

Remove Soul

Griffin Canyon

{T}: Add {C}.
{T}: Untap target Griffin. If it's a creature, it gets +1/+1 until end of turn.

Teremko Griffin

Flying; banding (Any creatures with banding, and up to one without, can attack in a band. Bands are blocked as a group. If any creatures with banding you control are blocking or being blocked by a creature, you divide that creature's combat damage, not its controller, among any of the creatures it's being blocked by or is blocking.)

Gerrard's Battle Cry

{2}{W}: Creatures you control get +1/+1 until end of turn.

Pearl Medallion

White spells you cast cost {1} less to cast.

Counterspell

Meekstone

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

Ekundu Griffin

Sphinx's Insight

Draw two cards.
Addendum — If you cast this spell during your main phase, you gain 2 life.

Island

Dromar's Cavern

When Dromar's Cavern enters, sacrifice it unless you return a non-Lair land you control to its owner's hand.
{T}: Add {W}, {U}, or {B}.

Empyrean Eagle

Flying
Other creatures you control with flying get +1/+1.

Archaeological Dig

{T}: Add {C}.
{T}, Sacrifice Archaeological Dig: Add one mana of any color.

Resplendent Griffin

Flying
Ascend (If you control ten or more permanents, you get the city's blessing for the rest of the game.)
Whenever Resplendent Griffin attacks, if you have the city's blessing, put a +1/+1 counter on it.

Azorius Guildgate

This land enters tapped.
{T}: Add {W} or {U}.

Senate Griffin

Flying
When Senate Griffin enters, scry 1.

Miraculous Recovery

Return target creature card from your graveyard to the battlefield. Put a +1/+1 counter on it.

Moment of Silence

Target player skips their next combat phase this turn.

Plains

Serra's Blessing

Creatures you control have vigilance. (Attacking doesn't cause them to tap.)

Tethered Griffin

Flying
When you control no enchantments, sacrifice Tethered Griffin.

Sentry of the Underworld

Flying, vigilance
{W}{B}, Pay 3 life: Regenerate Sentry of the Underworld.

Dovin's Acuity

When Dovin's Acuity enters, you gain 2 life and draw a card.
Whenever you cast an instant spell during your main phase, you may return Dovin's Acuity to its owner's hand.

Eye for an Eye

The next time a source of your choice would deal damage to you this turn, instead that source deals that much damage to you and Eye for an Eye deals that much damage to that source's controller.

Tranquil Cove

This land enters tapped.
When this land enters, you gain 1 life.
{T}: Add {W} or {U}.

Harrier Griffin

Flying
At the beginning of your upkeep, tap target creature.

High Ground

Each creature you control can block an additional creature each combat.

Zuberi, Golden Feather

Flying
Other Griffin creatures get +1/+1.

Kor Chant

All damage that would be dealt this turn to target creature you control by a source of your choice is dealt to another target creature instead.

Disenchant

Noble Purpose

Whenever a creature you control deals combat damage, you gain that much life.

Off Balance

Target creature can't attack or block this turn.

Meddle

If target spell has only one target and that target is a creature, change that spell's target to another creature.

Griffin Protector

Flying
Whenever another creature you control enters, Griffin Protector gets +1/+1 until end of turn.

Teferi's Moat

As Teferi's Moat enters, choose a color.
Creatures of the chosen color without flying can't attack you.