Sometimes an existing template can be used, but often, as with Brainstorm, a new template must be created
For example, if you exile a creature card without flash, you can cast it only during your main phase when the stack is empty
[Commander] 1 Omnath, Locus of All [/Commander] [Creatures] 1 Dockside Chef 1 Corpse Knight 1 Elas il-Kor, Sadistic Pilgrim 1 Ornithopter of Paradise 1 Ayara, First of Locthwain 1 Dryad of the Ilysian Grove 1 Mogiss Marauder 1 Teysa, Orzhov Scion 1 Ashenmoor Liege 1 Creakwood Liege 1 Deathless Knight 1 Elite Headhunter 1 Fanatic of Mogis 1 Glen Elendra Liege 1 Jetmir, Nexus of Revels 1 Master of Waves 1 Purphoros, God of the Forge 1 Springjack Shepherd 1 Deathbringer Liege 1 Divinity of Pride 1 Ghastlord of Fugue 1 Gray Merchant of Asphodel 1 Reverent Hoplite 1 Evangel of Heliod 1 Underworld Hermit 1 Abhorrent Overlord 1 Krrik, Son of Yawgmoth [/Creatures] [Sorceries] 1 Vandalblast 1 Ruinous Ultimatum 1 In Garruks Wake [/Sorceries] [Instants] 1 Sleight of Mind 1 Swords to Plowshares 1 Whim of Volrath 1 Alter Reality 1 Despark 1 Glamerdye 1 Heroic Intervention 1 Infernal Grasp 1 Mystic Reflection 1 Reap 1 Spectral Shift 1 Brokers Charm 1 Crystal Spray 1 Endless Detour 1 Void Rend [/Instants] [Artifacts] 1 Sol Ring 1 Arcane Signet 1 Fellwar Stone 1 Isochron Scepter 1 Lightning Greaves 1 Altar of the Pantheon 1 Chromatic Lantern 1 Nyx Lotus 1 Bolass Citadel [/Artifacts] [Enchantments] 1 Phyrexian Reclamation 1 Compost 1 Goblin Bombardment 1 Prismatic Omen 1 Ceta Sanctuary 1 Gravestorm 1 Dramatic Finale 1 Swirl the Mists 1 Dire Undercurrents [/Enchantments] [Lands] 1 Bojuka Bog 1 City of Brass 1 Command Tower 1 Exotic Orchard 1 Forbidden Orchard 1 Gemstone Mine 1 Grand Coliseum 1 Nykthos, Shrine to Nyx 1 Path of Ancestry 1 Pillar of the Paruns 1 Plaza of Heroes 1 Secluded Courtyard 1 The World Tree 1 Thriving Bluff 1 Thriving Grove 1 Thriving Heath 1 Thriving Isle 1 Thriving Moor 1 Unclaimed Territory 1 Vivid Crag 1 Vivid Creek 1 Vivid Grove 1 Vivid Marsh 1 Vivid Meadow 3 Forest 3 Island 3 Mountain 3 Plains [/Lands] [/Deck]
They also can be played on trigger
