No maximum hand size

Cards that do this

• Reliquary TowerLand
• Thought VesselArtifact
• Decanter of Endless WaterArtifact
• Wizard ClassEnchantment — Class
• Sea Gate Restoration // Sea Gate, RebornSorcery // Land
• Nezahal, Primal TideLegendary Creature — Elder Dinosaur
• Finale of RevelationSorcery
• Ancient Silver DragonCreature — Elder Dragon
• TriskaidekaphileCreature — Human Wizard
• Curiosity CrafterCreature — Bird Wizard
• Proft's Eidetic MemoryLegendary Enchantment
• SpellbookArtifact — Book
• Venser's JournalArtifact — Book
• Body of KnowledgeCreature — Avatar
• Niv-Mizzet, VisionaryLegendary Creature — Dragon Wizard
• Wrenn and SevenLegendary Planeswalker — Wrenn
• Library of LengArtifact
• Vnwxt, Verbose HostLegendary Creature — Homunculus
• Spirit Water RevivalSorcery
• Jin-Gitaxias // The Great SynthesisLegendary Creature — Phyrexian Praetor // Enchantment — Saga
• Enter the InfiniteSorcery
• Nerd RageEnchantment — Aura
• Kruphix, God of HorizonsLegendary Enchantment Creature — God
• The Magic MirrorLegendary Artifact
• Praetor's CounselSorcery
• Tishana, Voice of ThunderLegendary Creature — Merfolk Shaman
• Tamiyo, the Moon SageLegendary Planeswalker — Tamiyo
• Wisdom of AgesSorcery
• Tamiyo, Inquisitive Student // Tamiyo, Seasoned ScholarLegendary Creature — Moonfolk Wizard // Legendary Planeswalker — Tamiyo
• Roaring Furnace // Steaming Sauna//Enchantment — Room // Enchantment — Room
• Marina Vendrell's GrimoireLegendary Artifact — Book
• MordenkainenLegendary Planeswalker — Mordenkainen
• Morska, Undersea SleuthLegendary Creature — Vedalken Fish Detective
• Reed Richards, Smartest ManLegendary Creature — Human Scientist Hero
• Nyssa of TrakenLegendary Creature — Human Scientist
• Ms. Marvel, Kamala KhanLegendary Creature — Mutant Inhuman Hero
• Graceful AdeptCreature — Human Wizard
• Trusted AdvisorCreature — Human Advisor
• Minamo ScrollkeeperCreature — Human Wizard
• Live Long and ProsperSorcery
• Deep Space ScanSorcery
• Choice of FortunesSorcery
• The VanquisherHero