Creatures you control get +2/+0 until end of turn. If you control a modified creature, draw a card. (Equipment, Auras you control, and counters are modifications.)
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Animal Sanctuary
Land
{T}: Add {C}.
{2}, {T}: Put a +1/+1 counter on target Bird, Cat, Dog, Goat, Ox, or Snake.
{2}
Arcane Signet
Artifact
{T}: Add one mana of any color in your commander's color identity.
{2}{R}
Arcbound Tracker
Artifact Creature - Dog
Menace
Modular 2 (This creature enters the battlefield with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)
Whenever you cast a spell other than your first spell each turn, put a +1/+1 counter on Arcbound Tracker.
0 /
0
{X}{R}
Balduvian Rage
Instant
Target attacking creature gets +X/+0 until end of turn.
Draw a card at the beginning of the next turn's upkeep.
{3}{R}
Big Score
Instant
As an additional cost to cast this spell, discard a card.
Draw two cards and create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this artifact: Add one mana of any color.")
{2}{R}
Bolt Hound
Creature - Elemental Dog
Haste (This creature can attack and {T} as soon as it comes under your control.)
Whenever Bolt Hound attacks, other creatures you control get +1/+0 until end of turn.
2 /
2
{X}{X}{R}
Bonfire of the Damned
Sorcery
Bonfire of the Damned deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.
Miracle {X}{R} (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)
{3}
Coalition Relic
Artifact
{T}: Add one mana of any color.
{T}: Put a charge counter on Coalition Relic.
At the beginning of your first main phase, remove all charge counters from Coalition Relic. Add one mana of any color for each charge counter removed this way.
{3}
Commander's Sphere
Artifact
{T}: Add one mana of any color in your commander's color identity.
Sacrifice Commander's Sphere: Draw a card.
{3}
Decanter of Endless Water
Artifact
You have no maximum hand size.
{T}: Add one mana of any color.
{3}{R}
Dogpile
Instant
Dogpile deals damage to any target equal to the number of attacking creatures you control.
{3}{R}
Edgewall Pack
Creature - Dog
Menace (This creature can't be blocked except by two or more creatures.)
When Edgewall Pack enters the battlefield, create a 1/1 black Rat creature token with "This creature can't block."
3 /
3
{1}{R}{R}
Fiery Hellhound
Creature - Elemental Dog
{R}: Fiery Hellhound gets +1/+0 until end of turn.
2 /
2
{R}
Firebreathing
Enchantment - Aura
Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
{1}{R}
Ghitu Firebreathing
Enchantment - Aura
Flash (You may cast this spell any time you could cast an instant.)
Enchant creature
{R}: Enchanted creature gets +1/+0 until end of turn.
{R}: Return Ghitu Firebreathing to its owner's hand.
{R}
Goldhound
Artifact Creature - Treasure Dog
First strike
Menace (This creature can't be blocked except by two or more creatures.)
{T}, Sacrifice Goldhound: Add one mana of any color.
1 /
1
{2}{R}{R}
Hound of Griselbrand
Creature - Elemental Dog
Double strike
Undying (When this creature dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
2 /
2
{1}{R}
Igneous Cur
Creature - Elemental Dog
{1}{R}: Igneous Cur gets +2/+0 until end of turn.
1 /
2
{2}
Immolating Souleater
Artifact Creature - Phyrexian Dog
{R/P}: Immolating Souleater gets +1/+0 until end of turn. ({R/P} can be paid with either {R} or 2 life.)
1 /
1
{4}
Iron Mastiff
Artifact Creature - Dog
Whenever Iron Mastiff attacks, roll a d20 for each player being attacked and ignore all but the highest roll.
1--9 | Iron Mastiff deals damage equal to its power to you.
10--19 | Iron Mastiff deals damage equal to its power to defending player.
20 | Iron Mastiff deals damage equal to its power to each opponent.
4 /
4
{4}{R}{R}
Olivia's Attendants
Creature - Vampire
Menace
Whenever Olivia's Attendants deals damage, create that many Blood tokens. (They're artifacts with "{1}, {T}, Discard a card, Sacrifice this artifact: Draw a card.")
{2}{R}: Olivia's Attendants deals 1 damage to any target.
6 /
6
{1}{R}
Pack Mastiff
Creature - Dog
{1}{R}: Each creature you control named Pack Mastiff gets +1/+0 until end of turn.
2 /
2
{2}{R}
Poetic Ingenuity
Enchantment
Whenever one or more Dinosaurs you control attack, create that many Treasure tokens.
Whenever you cast an artifact spell, create a 3/1 red Dinosaur creature token. This ability triggers only once each turn.
{3}{R}
Tesak, Judith's Hellhound
Legendary Creature - Elemental Dog
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
Other Dogs you control have unleash.
Creatures you control with counters on them have haste.
Whenever Tesak, Judith's Hellhound attacks, add {R} for each attacking creature.
3 /
3
{2}{R}
The Reaver Cleaver
Legendary Artifact - Equipment
Equipped creature gets +1/+1 and has trample and "Whenever this creature deals combat damage to a player or planeswalker, create that many Treasure tokens."