(Bevy of Beebles) Baldin, Century Herdmaster Become the Avalanche Better Than One Body of Knowledge Bulwark Castle Locthwain Commence the Endgame Dark Suspicions Descendant of Soramaro Diviner's Portent Duggan, Private Detective Empyrial Armor Ensnaring Bridge Fateful Showdown Fires of Victory Hand of Vecna Heartwarming Redemption Inner Calm, Outer Strength Ivory Tower Jolrael, Mwonvuli Recluse Jolrael, Voice of Zhalfir Jushi Apprentice Jushi Apprentice Kagemaro's Clutch Kagemaro, First to Suffer Kitsune Loreweaver Kiyomaro, First to Stand Leonardo da Vinci Manifestation Sage Maro Maro Avatar Master the Way Masumaro, First to Live Meishin, the Mind Cage Minas Tirith Garrison Mordenkainen Mr
with Riku in play, you can cast the cards with no downside
This then allows blue to use counterspells to stop it, but if blue doesn't have that answer, this category tends to only delay threats rather than get rid of them
Brazen Blademaster will still get +2/+1 until end of turn
Portal: Three Kingdoms (1999) had two spells