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

{1}, {T}: Blisterspit Gremlin deals 1 damage to each opponent.

Whenever you cast a noncreature spell, untap Blisterspit Gremlin.

Target creature you control deals damage equal to its power to each other creature and each opponent.

This spell can't be countered.

+2: Each opponent gets an emblem with "At the beginning of your upkeep, this emblem deals 1 damage to you."

-3: Chandra, Awakened Inferno deals 3 damage to each non-Elemental creature.

-X: Chandra, Awakened Inferno deals X damage to target creature or planeswalker. If a permanent dealt damage this way would die this turn, exile it instead.

Trample

At the beginning of each player's end step, Crimson Honor Guard deals 4 damage to that player unless they control a commander.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

If another red source you control would deal damage to a permanent or player, it deals that much damage plus 1 to that permanent or player instead.

When Emberwilde Captain enters the battlefield, you become the monarch.

Whenever an opponent attacks you while you're the monarch, Emberwilde Captain deals damage to that player equal to the number of cards in their hand.

Creatures with power greater than the number of cards in your hand can't attack.

First strike

If a source would deal damage to an opponent, it deals double that damage to that player instead.

You can cast spells only during your turn and you can cast no more than two spells each turn.

You may cast spells with mana value less than or equal to the number of lands you control without paying their mana costs.

Whenever you cast an instant or sorcery spell, Guttersnipe deals 2 damage to each opponent.

If another red source you control would deal damage to a permanent or player, it deals that much damage plus 1 to that permanent or player instead.

-2: Jaya, Venerated Firemage deals 2 damage to any target.

{T}, Sacrifice Jeweled Lotus: Add three mana of any one color. Spend this mana only to cast your commander.

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)

Magmatic Sinkhole deals 5 damage to target creature or planeswalker.

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

If a red instant or sorcery spell you control or a red planeswalker you control would deal damage to a permanent or player, it deals that much damage plus 2 to that permanent or player instead.

Flying, haste, protection from white

{5}{R}{R}: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Stormbreath Dragon becomes monstrous, it deals damage to each opponent equal to the number of cards in that player's hand.

Defender

{T}: Thermo-Alchemist deals 1 damage to each opponent.

Whenever you cast an instant or sorcery spell, untap Thermo-Alchemist.

Thundering Rebuke deals 4 damage to target creature or planeswalker.

Haste

Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Each player discards their hand, then draws seven cards.