It can happen because a player casts a creature spell and thus a creature (which is considered a permanent card) enters the battlefield

$0.49 Dirgur Island Dragon (0294 - Showcase) Tarkir: Dragonstorm Variants $0.49 Kheru Goldkeeper (0313 - Showcase) Tarkir: Dragonstorm Variants $0.49 Breaching Dragonstorm (0299 - Showcase) Tarkir: Dragonstorm Variants $0.49 Armament Dragon (0307 - Showcase) Tarkir: Dragonstorm Variants $0.49 Purging Stormbrood (0315 - Showcase) Tarkir: Dragonstorm Variants $0.79 Roiling Dragonstorm (0296 - Showcase) Tarkir: Dragonstorm Variants $0.49 Jeskai Shrinekeeper (0311 - Showcase) Tarkir: Dragonstorm Variants $0.49 Twinmaw Stormbrood (0320 - Showcase) Tarkir: Dragonstorm Variants $0.49 Corroding Dragonstorm (0297 - Showcase) Tarkir: Dragonstorm Variants $0.49 Whirlwing Stormbrood (0322 - Showcase) Tarkir: Dragonstorm Variants $0.49 Encroaching Dragonstorm (0305 - Showcase) Tarkir: Dragonstorm Variants $0.49 Riling Dawnbreaker (0292 - Showcase) Tarkir: Dragonstorm Variants 0 results found

After the first turn, Search for Tomorrow is generally worse than other options, which makes drawing multiple bad and makes drawing it in hands that need to use Arcums Astrolabe for green bad, so Ive gone down to one, since it is the best first-turn play if you have it, and Im also playing one Sakura-Tribe Elder, one Cultivate, and one Kodamas Reach
Thats a heck of a long lead time, though it makes sense for a set as widely-hyped as this one
What affects the value of Torrential Gearhulk
He generates card advantage through combat, as well as reducing the costs of the creatures he finds by giving them undaunted