Enjoy your games, and dont be afraid to experiment.
These rarely cost the full amount, but still fulfill Herald's condition for dealing damage to your opponents
And it all works out in your favor
If you do care about the echo then the easier cost has some appeal

The List Creatures (22) 1 Solemn Simulacrum 1 Guttersnipe 1 Young Pyromancer 1 Tunneling Geopede 1 Thermo-Alchemist 1 Harsh Mentor 1 Neheb, the Eternal 1 Firebrand Archer 1 Rampaging Ferocidon 1 Electrostatic Field 1 Spear Spewer 1 Dockside Extortionist 1 Chandra's Incinerator 1 Spitfire Lagac 1 Storm-Kiln Artist 1 Kessig Flamebreather 1 Pain Distributor 1 Gimli, Counter of Kills 1 Charming Scoundrel 1 Unruly Catapult 1 Donna Noble 1 Sunshot Militia Planeswalkers (2) Lands (36) Spells (39) 1 Lightning Bolt 1 Ruby Medallion 1 Mana Flare 1 Sol Ring 1 Manabarbs 1 Lava Spike 1 Repercussion 1 Lightning Greaves 1 Mana Geyser 1 Seething Song 1 Grapeshot 1 Pyrohemia 1 Needle Drop 1 Chaos Warp 1 Blasphemous Act 1 Faithless Looting 1 Vandalblast 1 Fiery Confluence 1 Abrade 1 Blackblade Reforged 1 Light Up the Stage 1 Skewer the Critics 1 Arcane Signet 1 Thrill of Possibility 1 Deflecting Swat 1 Unleash Fury 1 Roiling Vortex 1 Jeska's Will 1 Commander's Plate 1 Court of Ire 1 Descent into Avernus 1 You've Been Caught Stealing 1 Wrenn's Resolve 1 Rising of the Day 1 Fiery Inscription 1 Flick a Coin 1 Throne of Eldraine 1 Tarrian's Soulcleaver 1 Tectonic Hazard Planeswalkers Lets start out strong with the planeswalkers

The expensive activated ability is one of the best in the game, and when you consider that you have access to every game changer and tutors are one of the measures that put your deck up a bracket, a super-powered creature tutor for creatures and that cheats the card into play is busted