Rolling Thunder

Rolling Thunder deals X damage divided as you choose among any number of targets.

Llanowar Elves

Fireball

This spell costs {1} more to cast for each target beyond the first.
Fireball deals X damage divided evenly, rounded down, among any number of targets.

Skyshroud Elf

Seeker of Skybreak

Heedless One

Trample
Heedless One's power and toughness are each equal to the number of Elves on the battlefield.

Forest

Lava Burst

Lava Burst deals X damage to any target. If Lava Burst would deal damage to a creature, that damage can't be prevented or dealt instead to another permanent or player.

Brush with Death

Buyback {2}{B}{B} (You may pay an additional {2}{B}{B} as you cast this spell. If you do, put this card into your hand as it resolves.)
Target opponent loses 2 life. You gain 2 life.

Elvish Guidance

Enchant land
Whenever enchanted land is tapped for mana, its controller adds an additional {G} for each Elf on the battlefield.

Wellwisher

{T}: You gain 1 life for each Elf on the battlefield.

Blaze

Vitalize

Wirewood Elf

Priest of Titania

{T}: Add {G} for each Elf on the battlefield.

Wirewood Lodge

{T}: Add {C}.
{G}, {T}: Untap target Elf.

Well of Knowledge

{2}: Draw a card. Any player may activate this ability but only during their draw step.

Quirion Elves

As Quirion Elves enters, choose a color.
{T}: Add {G}.
{T}: Add one mana of the chosen color.