rather, its the cards illustration thats treated with holo foil
Here with Goro-Goro and Satoru you find a home for silly little hasty dudes like Phoenix Chick, Frantic Scapegoat, and Gingerbrute
There's the impending mechanic from Duskmourn: House of Horror , found on enchantment creatures like Overlord of the Hauntwoods or Overlord of the Balemurk, that lets you cast them for cheaper as an enchantment, and they become creatures when they run out of time counters

Here are two decklists I've won tournaments with a Red-White Aggro Burn deck and an Azorius Control deck, each with vast differences in the number of cards I played in their sideboards: Boros Burn | Modern | Roman Fusco, SCG IQ/1st Creatures (12) 4 Eidolon of the Great Revel 4 Monastery Swiftspear 4 Goblin Guide Instants (16) 4 Lightning Bolt 4 Lightning Helix 4 Boros Charm 3 Searing Blaze 1 Shard Volley Sorceries (12) 4 Rift Bolt 4 Skewer the Critics 4 Lava Spike Lands (20) 3 Mountain 4 Sunbaked Canyon 4 Inspiring Vantage 3 Bloodstained Mire 2 Scalding Tarn 2 Sacred Foundry 2 Fiery Islet Sideboard (15) 4 Smash to Smithereens 4 Skullcrack 3 Kor Firewalker 2 Path to Exile 2 Searing Blood With the Burn deck being a dedicated strategy of every card trying to deal three or more damage to my opponents, my sideboard options were very limited
Theres also a whole sheet of old-border cards, some of which can only be found in old border, but most of which are also in the set as normal versions