Why can't I hold all these cards?!!!!

Commander: _____
Estimated Value: $293.8

Creatures (23)
1 Bellowing Tanglewurm $0.13
1 Elvish Mystic $0.22
1 Elvish Piper $3.08
1 Fierce Empath $0.12
1 Foe-Razer Regent $0.45
1 Ghalta, Primal Hunger $0.31
1 Gigantosaurus $1.50
1 Goreclaw, Terror of Qal Sisma $1.67
1 Impervious Greatwurm $0.33
1 Llanowar Elves $0.51
1 Mossbridge Troll $1.63
1 Myojin of Life's Web $8.73
1 Nylea, God of the Hunt $8.50
1 Protean Hulk $0.30
1 Psychosis Crawler $0.35
1 Rhonas the Indomitable $12.34
1 Selvala, Heart of the Wilds $39.99
1 Spearbreaker Behemoth $2.82
1 Stonehoof Chieftain $9.97
1 Stuffy Doll $3.62
1 Ulamog, the Ceaseless Hunger $28.47
1 Vigor $5.87
1 Worldspine Wurm $8.54
Lands (36)
1 Blighted Woodland $0.08
29 Forest $0.05
1 Mosswort Bridge $0.28
1 Myriad Landscape $1.38
1 Nykthos, Shrine to Nyx $19.46
1 Reliquary Tower $0.22
1 Rogue's Passage $0.11
1 Scavenger Grounds $1.86
Other Spells (40)
1 Beastmaster Ascension $3.78
1 Berserk $13.99
1 Blossoming Defense $0.14
1 Caged Sun $0.28
1 Cauldron of Souls $0.34
1 Cultivate $0.12
1 Darksteel Plate $6.19
1 Dragon Throne of Tarkir $0.32
1 Explosive Vegetation $0.13
1 Garruk, Caller of Beasts $0.30
1 Greater Good $3.42
1 Green Sun's Zenith $8.00
1 Growing Rites of Itlimoc  Flip $
1 Hammer of Nazahn $16.99
1 Harrow $0.08
1 Helm of the Host $5.52
1 Heroic Intervention $13.99
1 Invigorate $0.17
1 Kodama's Reach $0.13
1 Loxodon Warhammer $0.27
1 Mortal's Resolve $0.07
1 Nature's Lore $0.08
1 Nissa, Vastwood Seer  Flip $
1 Overwhelming Stampede $1.54
1 Quicksilver Amulet $4.54
1 Rampant Growth $0.09
1 Rancor $0.27
1 Selvala's Stampede $3.25
1 Skyshroud Claim $1.23
1 Sol Ring $0.53
1 Summoning Trap $0.52
1 Swiftfoot Boots $0.15
1 Sword of Feast and Famine $0.39
1 Thought Vessel $0.15
1 Tooth and Nail $17.47
1 Traverse the Outlands $9.50
1 Triumph of the Hordes $7.25
1 Venser's Journal $4.89
1 Vernal Bloom $3.34
1 Zendikar Resurgent $3.73
99 Cards Main

Draw 7

Mana Curve

# of Cards
CMC
8x
1
6x
2
12x
3
12x
4
8x
5
5x
6
6x
7
1x
8
1x
9
1x
10
1x
11

Color Breakdown

Symbols
Color
72