Whenever a creature you control attacks or a creature enters the battlefield under your control attacking, you may pay {1}{R}. If you do, you may put a creature card with mana value less than that creature's mana value from your hand onto the battlefield tapped and attacking.
3 /
3
{W}
Benevolent Bodyguard
Creature - Human Cleric
Sacrifice Benevolent Bodyguard: Target creature you control gains protection from the color of your choice until end of turn.
1 /
1
{2}{W}
Boromir, Warden of the Tower
Legendary Creature - Human Soldier
Vigilance
Whenever an opponent casts a spell, if no mana was spent to cast it, counter that spell.
Sacrifice Boromir, Warden of the Tower: Creatures you control gain indestructible until end of turn. The Ring tempts you.
3 /
3
{3}
Burnished Hart
Artifact Creature - Elk
{3}, Sacrifice Burnished Hart: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.
2 /
2
{2}{R}
Catalyst Elemental
Creature - Elemental
Sacrifice Catalyst Elemental: Add {R}{R}.
2 /
2
{W}
Children of Korlis
Creature - Human Rebel Cleric
Sacrifice Children of Korlis: You gain life equal to the life you've lost this turn. (Damage causes loss of life.)
1 /
1
{1}{W}
Cliffside Rescuer
Creature - Kor Soldier
Vigilance
{T}, Sacrifice Cliffside Rescuer: Target permanent you control gains protection from each of your opponents until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything controlled by those players.)
2 /
2
{4}{W}
Elesh Norn, Mother of Machines
Legendary Creature - Phyrexian Praetor
Vigilance
If a permanent entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
Permanents entering the battlefield don't cause abilities of permanents your opponents control to trigger.
4 /
7
{3}{R}{W}
Hofri Ghostforge
Legendary Creature - Dwarf Cleric
Spirits you control get +1/+1 and have trample and haste.
Whenever another nontoken creature you control dies, exile it. If you do, create a token that's a copy of that creature, except it's a Spirit in addition to its other types and it has "When this creature leaves the battlefield, return the exiled card to its owner's graveyard."
4 /
5
{W}
Kami of False Hope
Creature - Spirit
Sacrifice Kami of False Hope: Prevent all combat damage that would be dealt this turn.
1 /
1
{2}{W}
Loyal Retainers
Creature - Human Advisor
Sacrifice Loyal Retainers: Return target legendary creature card from your graveyard to the battlefield. Activate only during your turn, before attackers are declared.
1 /
1
{2}{R}
Magus of the Wheel
Creature - Human Wizard
{1}{R}, {T}, Sacrifice Magus of the Wheel: Each player discards their hand, then draws seven cards.
3 /
3
{4}
Panharmonicon
Artifact
If an artifact or creature entering the battlefield causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.
{4}{R}
Purphoros, Bronze-Blooded
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to red is less than five, Purphoros isn't a creature.
Other creatures you control have haste.
{2}{R}: You may put a red creature card or an artifact creature card from your hand onto the battlefield. Sacrifice it at the beginning of the next end step.
7 /
6
{3}{R}
Purphoros, God of the Forge
Legendary Enchantment Creature - God
Indestructible
As long as your devotion to red is less than five, Purphoros isn't a creature.
Whenever another creature enters the battlefield under your control, Purphoros deals 2 damage to each opponent.
{2}{R}: Creatures you control get +1/+0 until end of turn.
6 /
5
{3}{W}
Ranger of Eos
Creature - Human Soldier Ranger
When Ranger of Eos enters the battlefield, you may search your library for up to two creature cards with mana value 1 or less, reveal them, put them into your hand, then shuffle.
3 /
2
{1}{R}
Reckless Barbarian
Creature - Dragon Barbarian
Sacrifice Reckless Barbarian: Add {R}{R}.
2 /
2
{W}
Selfless Savior
Creature - Dog
Sacrifice Selfless Savior: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)
1 /
1
{1}{W}
Selfless Spirit
Creature - Spirit Cleric
Flying
Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.
2 /
1
{3}{R}
Sneak Attack
Enchantment
{R}: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.
{1}
The Ozolith
Legendary Artifact
Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith.
At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.
{1}{W}{W}
Werefox Bodyguard
Creature - Elf Fox Knight
Flash
When Werefox Bodyguard enters the battlefield, exile up to one other target non-Fox creature until Werefox Bodyguard leaves the battlefield.
{1}{W}, Sacrifice Werefox Bodyguard: You gain 2 life.