Armageddon

Torbran, Thane of Red Fell

If a red source you control would deal damage to an opponent or a permanent an opponent controls, it deals that much damage plus 2 instead.

Wildfire

Each player sacrifices four lands. Wildfire deals 4 damage to each creature.

Manabarbs

Whenever a player taps a land for mana, Manabarbs deals 1 damage to that player.

Vryn Wingmare

Flying
Noncreature spells cost {1} more to cast.

Island

Plea for Guidance

Search your library for up to two enchantment cards, reveal them, put them into your hand, then shuffle.

Fiery Emancipation

If a source you control would deal damage to a permanent or player, it deals triple that damage to that permanent or player instead.

Thalia, Guardian of Thraben

First strike
Noncreature spells cost {1} more to cast.

Gisela, Blade of Goldnight

Flying, first strike
If a source would deal damage to an opponent or a permanent an opponent controls, that source deals double that damage to that player or permanent instead.
If a source would deal damage to you or a permanent you control, prevent half that damage, rounded up.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle.