Power Pack

an instant leaves a graveyard — 167 cards in Power Pack's colors can cause this (Power Pack is one).

1. Murktide Regent — When an instant leaves a graveyard thanks to Power Pack, Murktide Regent puts a +1/+1 counter on itself

a nontoken Hero enters the battlefield — 328 cards in Power Pack's colors can cause this (Power Pack is one).

1. Black Panther, Vanguard — When Power Pack enters, Black Panther, Vanguard triggers

a Hero enters the battlefield — 344 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack enters:

1. Hawkeye, Trick Shot — deals damage
2. Captain America, Team Leader — grants haste and vigilance
3. Nighthawk, Dark Defender — gives +1/+1
4. Team Transmitter — gains you 1 life

anything is exiled — 1,735 cards in Power Pack's colors can cause this (Power Pack is one).

1. The War Doctor — When an instant or sorcery is exiled thanks to Power Pack, The War Doctor puts a time counter on itself

1 other card cares about it too. These are the ones with the most connections.

anything leaves a graveyard — 1,321 cards in Power Pack's colors can cause this (Power Pack is one).

When an instant or sorcery leaves a graveyard thanks to Power Pack:

1. Hologram Stalker — makes a token
2. Quintorius, Field Historian — makes a token
3. Garrison Excavator — makes a token
4. Quintorius, History Chaser — makes a token
5. Hardened Academic — puts a counter on a creature
6. On Wings of Gold — makes a token
7. Owlin Historian — gets +1/+1
8. Willow Geist — puts a +1/+1 counter on itself
9. Spirit of Resilience — puts a +1/+1 counter on itself
10. Kirol, History Buff // Pack a Punch — becomes prepared

5 other cards care about it too. These are the ones with the most connections.

a Human enters the battlefield — 3,638 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack enters:

1. Heronblade Elite — puts a +1/+1 counter on itself
2. Kyler, Sigardian Emissary — puts a +1/+1 counter on itself
3. Thalia's Lieutenant — puts a +1/+1 counter on itself
4. Champion of the Parish — puts a +1/+1 counter on itself
5. Captain of the Mists — untaps itself
6. Erkenbrand, Lord of Westfold — gives +1/+0
7. Beregond of the Guard — gives +1/+1
8. Théoden, King of Rohan — grants double strike
9. Dawnhart Disciple — gets +1/+1
10. Lossarnach Captain — taps a creature an opponent controls

1 other card cares about it too. These are the ones with the most connections.

anything attacks — 13,622 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack attacks:

1. Shaun, Father of Synths — makes a token
2. Invisible Woman — triggers
3. Guide of Souls — triggers
4. Campsite Cuisine — sacrifices a Food
5. Gossip's Talent — triggers
6. Banon, the Returners' Leader — draws and discards
7. Toph, Earthbending Master — puts a counter on a permanent
8. Three Dog, Galaxy News DJ — sacrifices an Aura
9. Inti, Seneschal of the Sun — triggers
10. Gut, True Soul Zealot — sacrifices a creature or artifact

85 other cards care about it too. These are the ones with the most connections.

a creature attacks — 13,622 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack attacks:

1. Adaptive Omnitool — searches a library
2. Kindred Discovery — draws you 1 card
3. Jolene, Plundering Pugilist — makes a token
4. Anim Pakal, Thousandth Moon — puts a +1/+1 counter on itself
5. The Earth King — searches a library
6. Saw — sacrifices a creature
7. Ultima Weapon — kills a creature an opponent controls
8. Path of Mettle // Metzali, Tower of Triumph — triggers
9. Total War — kills a creature
10. The Spear of Leonidas — triggers

146 other cards care about it too. These are the ones with the most connections.

a creature blocks — 13,622 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack blocks:

1. Tide of War — sacrifices a creature
2. Dead-Iron Sledge — kills a creature
3. Dwindle — kills a creature

18 other cards care about it too. These are the ones with the most connections.

a creature is cast — 13,676 cards in Power Pack's colors can cause this (Power Pack is one).

1. God-Eternal Oketra — When Power Pack is cast, God-Eternal Oketra makes a token

80 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 14,989 cards in Power Pack's colors can cause this (Power Pack is one).

When Power Pack enters:

1. Slash, Reptile Rampager — deals 2 damage
2. Gimli of the Glittering Caves — puts counters on a permanent
3. Ray Fillet, Wave Warrior — puts a counter on itself
4. Legolas Greenleaf — puts a counter on a permanent
5. The Neutrinos — gets +1/+0
6. Wingnut, Bat on the Belfry — grants flying, haste and menace
7. Aetherstorm Roc — puts a counter on a permanent you control
8. Raphael, Most Attitude — exiles a card from your library

264 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 20,593 cards in Power Pack's colors can cause this (Power Pack is one).

1. Prowl, Stoic Strategist // Prowl, Pursuit Vehicle — When Power Pack enters, Prowl, Stoic Strategist // Prowl, Pursuit Vehicle puts a +1/+1 counter on itself

33 other cards care about it too. These are the ones with the most connections.