Im not sure a card like this has what it takes outside of Standard, but there are enough four-drops and greater for it to be a powerful threat there
With such a legacy, there are many, many creatures worthy of power and attention

Silver Swarm View on Archidekt Commander (1) 1 Sliver GravemotherSliver Gravemother Artifacts (7) 1 Arcane SignetArcane Signet 1 Fellwar StoneFellwar Stone 1 Herald's HornHerald's Horn 1 Icon of AncestryIcon of Ancestry 1 Pillar of OriginsPillar of Origins 1 Sol RingSol Ring 1 Vanquisher's BannerVanquisher's Banner Creatures (43) 1 Blade SliverBlade Sliver 1 Blur SliverBlur Sliver 1 Bonescythe SliverBonescythe Sliver 1 Bonesplitter SliverBonesplitter Sliver 1 Brood SliverBrood Sliver 1 Capricious SliverCapricious Sliver 1 Cleaving SliverCleaving Sliver 1 Clot SliverClot Sliver 1 Cloudshredder SliverCloudshredder Sliver 1 Constricting SliverConstricting Sliver 1 Crypt SliverCrypt Sliver 1 Crystalline SliverCrystalline Sliver 1 Diffusion SliverDiffusion Sliver 1 Firewake SliverFirewake Sliver 1 Galerider SliverGalerider Sliver 1 Gemhide SliverGemhide Sliver 1 Harmonic SliverHarmonic Sliver 1 Hatchery SliverHatchery Sliver 1 Hibernation SliverHibernation Sliver 1 Hollowhead SliverHollowhead Sliver 1 Lavabelly SliverLavabelly Sliver 1 Lazotep SliverLazotep Sliver 1 Manaweft SliverManaweft Sliver 1 Megantic SliverMegantic Sliver 1 Might SliverMight Sliver 1 Necrotic SliverNecrotic Sliver 1 Quick SliverQuick Sliver 1 RealmwalkerRealmwalker 1 Regal SliverRegal Sliver 1 Rukarumel, BiologistRukarumel, Biologist 1 Sentinel SliverSentinel Sliver 1 Shifting SliverShifting Sliver 1 Sinew SliverSinew Sliver 1 Sliver HivelordSliver Hivelord 1 Spiteful SliverSpiteful Sliver 1 Striking SliverStriking Sliver 1 Synapse SliverSynapse Sliver 1 Syphon SliverSyphon Sliver 1 Taunting SliverTaunting Sliver 1 Titan of LittjaraTitan of Littjara 1 Two-Headed SliverTwo-Headed Sliver 1 Venom SliverVenom Sliver 1 Winged SliverWinged Sliver Sorceries (10) 1 Cleansing NovaCleansing Nova 1 Crippling FearCrippling Fear 1 CultivateCultivate 1 DecimateDecimate 1 Distant MelodyDistant Melody 1 FarseekFarseek 1 Harsh MercyHarsh Mercy 1 Nature's LoreNature's Lore 1 Three VisitsThree Visits 1 WindfallWindfall Enchantments (1) 1 Descendants' FuryDescendants' Fury Instants (1) 1 For the AncestorsFor the Ancestors Lands (37) 1 Ash BarrensAsh Barrens 1 Canopy VistaCanopy Vista 1 Cinder GladeCinder Glade 1 Command TowerCommand Tower 1 Exotic OrchardExotic Orchard 1 Flood PlainFlood Plain 3 ForestForest 1 Frontier BivouacFrontier Bivouac 1 GrasslandsGrasslands 1 Irrigated FarmlandIrrigated Farmland 2 IslandIsland 1 Jungle ShrineJungle Shrine 2 MountainMountain 1 Mountain ValleyMountain Valley 1 Mystic MonasteryMystic Monastery 1 Nomad OutpostNomad Outpost 1 Opulent PalaceOpulent Palace 1 Path of AncestryPath of Ancestry 2 PlainsPlains 1 Prairie StreamPrairie Stream 1 Rocky Tar PitRocky Tar Pit 1 Sandsteppe CitadelSandsteppe Citadel 1 Savage LandsSavage Lands 1 Scattered GrovesScattered Groves 1 Seaside CitadelSeaside Citadel 1 Secluded CourtyardSecluded Courtyard 1 Sheltered ThicketSheltered Thicket 1 Smoldering MarshSmoldering Marsh 1 Sunken HollowSunken Hollow 2 SwampSwamp 1 Unclaimed TerritoryUnclaimed Territory With this list we have a good setup for a Slivers deck that has the power to swarm the board

Back in 1995, Wizards decided that some players were missing out on cards from older sets, so they released Fourth Edition and another expansion, Chronicles
Count the number of attacking creatures when Tesak, Judith's Hellhound's last ability resolves, including Tesak itself if it's still on the battlefield, to determine how much mana to add