The four-cost ramp spell is usually the double land getter Explosive Vegetation and others of that ilk, and that's just 99 cents too, not that bad
And dont forget that non-Threshold spells can be effective in this strategy as well - just read at Huskburster Swarm and giggle at the thought of casting it for a single mana
9: Belbe, Corrupted Observer - Commander Legends I love that Belbe finally got a card after being relegated to flavor text for 20 years
Black likes to play with the graveyard in this set with unearth, and multiple resurrection creatures
For years, white players watched in envy as green mages effortlessly pulled lands from their decks and blue wizards drew cards with abandon
According to Wizards of the Coast's official collector's guide, each Secrets of Strixhaven Play Booster contains at least one Mystical Archive card