Unbound Flourishing and Branching Evolution are fantastic card alongside the ravenous Tyranids, especially in decks focused on Magus Lucea Kane in the command zone
If there are additional costs to cast a spell, or if the cost to cast a spell is increased by an effect (such as the one created by Thalia, Guardian of Thraben's ability), apply those increases before applying cost reductions
I often hear how the English sets have no identity compared to Japanese

Abyssal Harvester Adagia, Windswept Bastion Adorned Pouncer Altar Ibn-La'Ahad Angel of Sanctions Anikthea, Hand of Erebos Anointer Priest Applied Geometry Arboreal Alliance Arcane Artisan Ardyn, the Usurper Arna Kennerd, Skycaptain Artificer Class Ashling's Command Ashling, the Limitless Assemble from Parts Auton Soldier Aven Initiate Aven Wind Guide Awaken the Maelstrom Back from the Brink Banshee of the Dread Choir Battle for Bretagard Benthic Anomaly Biowaste Blob Blade of Selves Bloodforged Battle-Axe Blue Sun's Twilight Bramble Sovereign Brenard, Ginger Sculptor Brigid's Command Broodbirth Viper Cabaretti Confluence Cackling Counterpart Cadric, Soul Kindler Calamity, Galloping Inferno Calix, Guided by Fate Caller of the Pack Caller of the Untamed Caretaker's Talent Caught in a Parallel Universe Champion of Wits Chandra, Flameshaper Chrome Dome City of Death Clone Legion Cogwork Assembler Coiling Rebirth Colorstorm Stallion Compy Swarm Conclave Evangelist Copy Catchers Corporeal Projection Council of Reeds Coursers' Accord Court of Vantress Croaking Counterpart Cursecloth Wrappings Cybermen Squadron Dalek Squadron Dance of Many Delina, Wild Mage Determined Iteration Dino DNA Dollhouse of Horrors Donatello, Gadget Master Dreadfeast Demon Dreamstealer Druid's Deliverance Dual Nature Duke Ulder Ravengard Dutiful Replicator

If the spell you're casting is a reanimation spell, you can reanimate Hidetsugu and Kairi, triggering them again, and killing off your opponents by just doing the 'ol lather rinse repeat