Talrand, Sky Summoner has been the go-to in this design space for years, as its 2/2 drakes have built in evasion, but Deekah, Fractal Theorist can force damage through in a pinch by making big tokens unblockable as well
You can't pay more energy counters than you have

Hans, Run!" Aang's Journey Absorb Vis Abzan Monument Ainok Guide Alpine Guide Analyze the Pollen Angrath's Fury Arachnus Spinner Archdruid's Charm Arid Mesa Armillary Sphere Ash Barrens Asmoranomardicadaistinaculdacar Assembly Hall Atalan Jackal Attune with Aether Aurochs Herd Avarax Axgard Armory Ayara's Oathsworn Bad River Balamb T-Rexaur Bant Panorama Battle Plan Beamsaw Prospector Beanstalk Giant Beanstalk Giant Bebop, Warthog Warrior Bedhead Beastie Behemoth's Herald Behold My Grandeur Behold the Beyond Beneath the Sands Beseech the Mirror Beseech the Queen Bifurcate Binding the Old Gods Bioengineered Future Biotech Specialist Birthing Pod Bitterheart Witch Bitterthorn, Nissa's Animus Black Chocobo Blighted Woodland Blightspeaker Blood Speaker Bloodstained Mire Bloomvine Regent Bloomvine Regent Bog Glider Bogbrew Witch Boggart Harbinger Borderland Ranger Boseiju Reaches Skyward Boundless Realms Bountiful Landscape Braidwood Sextant Brainspoil Brave the Wilds Bringer of the Black Dawn Brokers Hideout Brutalizer Exarch Buried Alive Burning-Rune Demon Burnished Hart Bushwhack Cabaretti Courtyard Call the Mountain Chocobo Campus Guide Canoptek Wraith Canyon Crawler

They can be creatures, enchantments, or other card types, making them great for reacting to threats, protecting your board, or turning the tide at unexpected moments