Why Culling Ritual is so GOOD For my Dinosaur Deck

Culling Ritual is so good for my deck because there are almost no small permanents that get destroyed. It wipes out numerous strategies and simply covers almost all small stuff decks. It could even make enough mana that I can cast Ghalta, Stampede Tyrant in some cases but if that's only Carnage Tyrant, I can live with it!
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Deck
4 Tyrranax Rex (ONE) 189
4 Carnage Tyrant (XLN) 179
4 Ghalta, Stampede Tyrant (LCI) 185
4 Vaultborn Tyrant (BIG) 20
4 Palani's Hatcher (LCI) 237
4 Regisaur Alpha (XLN) 227
4 Sunken Citadel (LCI) 285
4 Castle Garenbrig (ELD) 240
5 Forest (JMP) 73
2 Cavern of Souls (LCI) 269
4 Up the Beanstalk (WOE) 195
4 Sylvan Scrying (BFZ) 192
4 Archdruid's Charm (MKM) 151
4 Overgrown Tomb (GRN) 253
1 Ziatora's Proving Ground (SNC) 261
4 Culling Ritual (STX) 172
Sideboard
3 Pick Your Poison (MKM) 170
4 Anoint with Affliction (ONE) 81
4 Sphere of Annihilation (AFR) 121
4 Leyline of Sanctity (WOT) 10
MtG Dino, Magic the Gathering Dinosaurs are my passion but I have so many exciting ideas that one day I hope to share with all of you. It has been a great experience so far and I don't see that changing. This RUclips thing is where I want to spend my time and continues to be a dream come true.
Why Culling Ritual is so GOOD For my Dinosaur Deck