Thunderscape Familiar

a Kavu enters the battlefield — 113 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar enters:

1. Kavu Monarch — puts a +1/+1 counter on itself
2. Possibility Technician — exiles a card from your library

an artifact it makes cheaper to cast — 4,531 cards in the game can cause this (Thunderscape Familiar is one).

Thunderscape Familiar reduces what:

1. Their Number Is Legion — costs
2. Biotransference — costs
3. Robot Domination — costs
4. Emergency Weld — costs
5. Altar of Bhaal // Bone Offering — costs
6. Teval's Judgment — costs
7. Ulvenwald Mysteries — costs

4,524 other cards care about it too. These are the ones with the most connections.

anything attacks — 17,934 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar attacks:

1. Far Fortune, End Boss — deals 1 damage
2. Temmet, Naktamun's Will — draws you 1 card
3. Grim Javelineer — gives +1/+0
4. Invisible Woman — triggers
5. Caesar, Legion's Emperor — sacrifices a creature
6. Guide of Souls — triggers
7. Campsite Cuisine — sacrifices a Food
8. Gossip's Talent — triggers
9. Banon, the Returners' Leader — draws and discards
10. Toph, Earthbending Master — puts a counter on a permanent

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

a creature attacks — 17,934 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar attacks:

1. Adaptive Omnitool — searches a library
2. Anthem of Rakdos — gives +2/+0
3. Kindred Discovery — draws you 1 card
4. Invasion of New Capenna // Holy Frazzle-Cannon — puts counters on a permanent
5. Chorale of the Void — brings a card back
6. Saw — sacrifices a creature
7. Gisa's Favorite Shovel — makes an opponent sacrifice a creature
8. Ultima Weapon — kills a creature an opponent controls
9. Path of Mettle // Metzali, Tower of Triumph — triggers
10. Total War — kills a creature

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

a creature blocks — 17,934 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar blocks:

1. Mage Hunters' Onslaught — makes a player lose 1 life
2. Carnage Gladiator — makes a player lose 1 life
3. Barrow-Blade — strips abilities
4. Heat of Battle — deals 1 damage
5. Battle Strain — deals 1 damage
6. Favor of the Woods — gains you 3 life
7. Tide of War — sacrifices a creature
8. Dead-Iron Sledge — kills a creature
9. Dwindle — kills a creature
10. Shield of the Righteous — triggers

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

a nontoken creature attacks — 17,934 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar attacks:

1. Mardu Ascendancy — makes a token
2. Basri Ket — makes a token
3. Militia's Pride — makes a token

a creature it makes cheaper to cast — 19,392 cards in the game can cause this (Thunderscape Familiar is one).

Thunderscape Familiar reduces what:

1. Devouring Sugarmaw // Have for Dinner — costs
2. The Rani — costs
3. Kaito, Dancing Shadow — costs
4. Daretti, Ingenious Iconoclast — costs
5. Invasion of Tolvada // The Broken Sky — costs
6. Parasitic Implant — costs
7. Promise of Aclazotz // Foul Rebirth — costs
8. Start // Finish — costs
9. Pestilent Cauldron // Restorative Burst — costs
10. Haunt the Network — costs

19,381 other cards care about it too. These are the ones with the most connections.

a creature enters the battlefield — 19,800 cards in the game can cause this (Thunderscape Familiar is one).

When Thunderscape Familiar enters:

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

3,030 other cards care about it too. These are the ones with the most connections.

anything enters the battlefield — 26,499 cards in the game can cause this (Thunderscape Familiar is one).

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

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