Alrighty, I'm tired of having to go to the wiki and list all the low cost creatures when making speedbows and whatnot, so I'm just gonna make a list of card cost here so everyone can use it. Gold = upped.
0 costOther: Dagger, Dirk

Nova

Soul Catcher, Soul Catcher

Gnome Gemfinder

Photon, Ray of Light, Holy Flash

Damselfly

Immolation, Cremation

Sundial

Spark, Ball Lightning
1 costOther: Short Sword, Shield, Long Sword

Schrödinger's Cat, Chaos Seed, Micro Abomination, Schrödinger's Cat, Chaos Power

Skeleton, Virus, Poison, Elite Skeleton

Graviton Firemaster, Unstoppable, Gravity Force

Gnome Rider, Iridium Warden, Plate Armor, Vanadium Warden, Heavy Armor, Protect Artifact, Granite Skin, Basilisk Blood

Rustler, Leaf Dragon

Ash Eater, Brimstone Eater, Fire Lance, Explosion

Chrysaora, Freeze, Physalia, Congeal, Purify, Ice Lance

Holy Light, Reflective Shield, Luciferase (

)

Dragonfly, Flying Weapon, Improved Fog, Lightning Storm, Shockwave, Animate Weapon (

)

Deja Vu, Sundial, Elite Deja Vu, Rewind, Precognition

Vampire Stiletto, Siphon Life, Nightmare

Thunderbolt
2 costOther: Short Bow, Hammer, Longbow, Gavel

Lycanthrope, Mutation, Werewolf, Supernova

Deathstalker, Arsenic, Arsenic, Retrovirus, Skull Shield, Deadly Poison, Improved Plague

Graviton Fire Eater, Momentum, Gravity Pull, Acceleration, Graviton Guard

Antlion, Enchant Artifact, Stone Skin, Basilisk Blood, Elite Antlion, Quicksand

Horned Frog, Forest Spirit, Druidic Staff, Giant Frog, Jade Staff, Improved Heal

Fire Spirit, Deflagration, Minor Phoenix

Mind Flayer, Ice Bolt, Inundation

Luciferin, Mirror Shield, Solar Buckler, Improved Blessing

Fog Shield, Thunderstorm, Shockwave

Scarab, Reverse Time, Precognition, Elite Scarab

Devourer, Parasite, Nightmare, Voodoo Doll, Voodoo Doll, Pest, Bloodsucker, Vampire Dagger

Lightning, Silence (hurr, Silence is golden)
3 costOther: Shard of Divinity, Gratitude and Readiness

Dissipation Shield, Pandemonium, Discord, Discord, Dissipation Field, Improved Mutation

Flesh Spider, Vulture, Boneyard, Flesh Recluse, Condor, Elite Mummy

Catapult, Gravity Shield, Black Hole, Trebuchet

Graboid, Earthquake, Elite Graboid

Cockatrice, Forest Scorpion, Heal, Elite Cockatrice, Scorpion, Forest Spectre, Epinephrine

Fire Bolt, Rage Potion, Fahrenheit, Fahrenheit, Rage Elixir, Fire Spectre

Blue Crawler, Arctic Squid, Flooding, Trident, Poseidon, Arctic Octopus, Ulitharid

Guardian Angel, Blessing, Solar Shield, Sanctuary

Firefly, Elite Firefly, Wings

Fate Egg, Dune Scorpion, Fate Egg, Dune Scorpion

Minor Vampire, Nightfall, Drain Life, Improved Steal, Cloak

Phase Spider, Silence, Lobotomizer, Electrocutor, Quintessence
4 cost
Fallen Elf, Butterfly Effect

Mummy, Plague

Graviton Mercenary, Otyugh

Hematite Golem, Pulverizer, Titanium Shield, Pulverizer, Steel Golem

Adrenaline, Mitosis

Fire Buckler

Steam Machine, Abyss Crawler

Pegasus, Sanctuary, Elite Pegasus

Wings, Wyrm, Elite Wyrm

Golden Hourglass, Electrum Hourglass, Turtle Shield

Steal, Liquid Shadow, Cloak, Improved Dusk, Eclipse

Phase Recluse, Mindgate
5 costOther: Tower Shield

Abomination, Butterfly Effect, Maxwell's Demon, Maxwell's Demon, Fallen Druid, Pandemonium

Graveyard, Bone Wall

Sapphire Charger, Armagio, Gravity Shield, Titan, Titan, Elite Charger, Elite Armagio, Elite Otyugh

Emerald Shield, Mitosis, Feral Bond

Lava Golem, Lava Destroyer, Firestorm

Toadfish, Puffer Fish, Steam Machine

Morning Star, Crusader, Crusader, Morning Glory

Owl's Eye, Eagle's Eye, Unstable Gas

Eternity

Gargoyle, Gargoyle, Vampire

Mindgate, Phase Shield
6 cost
Improved Antimatter

Aflatoxin

Chimera

Fire Shield

Ice Shield, Nymph's Tears

Archangel

Unstable Gas

Procrastination, Eternity, Ghost of the Past

Dusk Mantle

Immortal, Dimensional Shield, Twin Universe
Card amount in total for all elements and "other", including pillars and pendulums:

9(+12 marks)

17

18

17

17

16

15

17

17

16

17

17

15
195 non-pillar/pendulum cards in total, including Mark cards and Nymphs, not including Malignant Cell and Relic.
(1.26)
[17:35:02] SpikeSpiegel: cards total cost in bazaar
[17:35:10] SpikeSpiegel: 7705
[17:35:18] SpikeSpiegel: without pillars/pendulums
[17:35:36] SpikeSpiegel: *6= 46230
[17:41:33] SpikeSpiegel: Cost to buy and up 6 copies of all cards in the bazaar (except pillars/pendulums):
[17:44:14] SpikeSpiegel: (146*6)*1500= 1.314.000 + 46.230 = 1.360.230
[17:50:44] SpikeSpiegel: Cost to buy and up 15 pillars and 15 pendulums in the bazaar:
[17:50:54] SpikeSpiegel: (13*15)+6= 1170 (12*15)*24 = 4320
[17:51:02] SpikeSpiegel: (195 pillars + 180 pendulums)*1500 = 562.500
[17:51:10] SpikeSpiegel: Total cost: 562.500 + 1.170 + 4.320 = 567.990
[17:51:21] SpikeSpiegel: Total card cost: 1.360.230 + 567.990 = 1.928.220 (except rares)
[18:00:57] SpikeSpiegel: Cost to up 6 copies of 18 rares card =
[18:01:14] SpikeSpiegel: (6*18)*1500= 162.000
[18:02:11] SpikeSpiegel: Total cost: 1.928.220 + 162.000 = 2.090.220