You can Special Summon this card (from your hand). When you do: Your opponent can target 1 monster in their Graveyard; your opponent Special Summons that target to their side of the field.
Soul Release is the most direct way to remove cards from your opponent’s Graveyard, before you Special Summon Gilasaurus. This will ensure they are unable to Special Summon any monsters due to Gilasaurus’ effect.
Jurassic World is a Field Spell that increases the ATK and DEF of all Dinosaur-type monsters by 300. Fossil Dig is able to search for any Dinosaur monster which is Level 6 or lower, from your Deck. Fossil Excavation can Special Summon any Dinosaur monster from your Graveyard, but its effects are negated.