Grove of the Burnwillows

{T}: Add {C}.
{T}: Add {R} or {G}. Each opponent gains 1 life.

Nature's Claim

Destroy target artifact or enchantment. Its controller gains 4 life.

Badlands

Savannah

Greater Auramancy

Other enchantments you control have shroud. (A permanent with shroud can't be the target of spells or abilities.)
Enchanted creatures you control have shroud.

Sol Ring

Swords to Plowshares

Exile target creature. Its controller gains life equal to its power.

Skyshroud Cutter

If you control a Forest, rather than pay this spell's mana cost, you may have each other player gain 5 life.

Wall of Shards

Defender, flying
Cumulative upkeep—An opponent gains 1 life. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

Curse of the Forsaken

Enchant player
Whenever a creature attacks enchanted player, its controller gains 1 life.

Condemn

Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.

Tainted Remedy

If an opponent would gain life, that player loses that much life instead.

Rain of Gore

If a spell or ability would cause its controller to gain life, that player loses that much life instead.

Marsh Flats

{T}, Pay 1 life, Sacrifice Marsh Flats: Search your library for a Plains or Swamp card, put it onto the battlefield, then shuffle.

Fiery Justice

Fiery Justice deals 5 damage divided as you choose among any number of targets. Target opponent gains 5 life.

Scrubland

Plateau

Enlightened Tutor

Search your library for an artifact or enchantment card, reveal it, then shuffle and put that card on top.