It is said that Isperia had never convicted an innocent - at least by Azorius standards
Yes, a Hylda deck is going to want cards like Icy Manipulator and of course Hyldas Crown of Winter to tap down creatures, and those sorts of cards have traditionally been used to force opponents to commit more creatures to the battlefield and then get pummeled with a battlefield sweeper like Wrath of God
Be it a reanimator deck that needs self-mill, a storm deck, or a Splinter Twin + Pestermite combo deck, blue is usually involved somehow

Release date: 2003-02-03 Akroma, Angel of Wrath Akroma's Devoted Aven Redeemer Aven Warhawk Beacon of Destiny Celestial Gatekeeper Cloudreach Cavalry Daru Mender Daru Sanctifier Daru Stinger Defender of the Order Deftblade Elite Essence Sliver Gempalm Avenger Glowrider Liege of the Axe Lowland Tracker Planar Guide Plated Sliver Starlight Invoker Stoic Champion Sunstrike Legionnaire Swooping Talon Wall of Hope Ward Sliver Whipgrass Entangler White Knight Windborn Muse Wingbeat Warrior Aven Envoy Cephalid Pathmage Chromeshell Crab Covert Operative Crookclaw Elder Dermoplasm Dreamborn Muse Echo Tracer Fugitive Wizard Gempalm Sorcerer Glintwing Invoker Keeneye Aven Keeper of the Nine Gales Master of the Veil Merchant of Secrets Mistform Seaswift Mistform Sliver Mistform Ultimus Mistform Wakecaster Primoc Escapee Riptide Director Riptide Mangler Shifting Sliver Synapse Sliver Voidmage Apprentice Wall of Deceit Warped Researcher Weaver of Lies Willbender Aphetto Exterminator Bane of the Living Blood Celebrant Corpse Harvester Crypt Sliver Dark Supplicant Deathmark Prelate Drinker of Sorrow Dripping Dead Earthblighter Embalmed Brawler Gempalm Polluter Ghastly Remains Goblin Turncoat

Removing a counter to regenerate it is just the cherry on top
Im not advocating buying Sweltering Suns right now