Those lands have to be the same land type (basic type, Gate, etc.), which means you should likely either be mono-red or play something like Prismatic Omen
This is the first creature cycle of five creature across the colors
Similarly, Lightning Bolt and Swords to Plowshares represent the peak of efficiency for their effects, remaining staples for decades because no other cards do their job better for the cost
Heavy Helmet almost feels like adding an invisible Giant Cape to the scary Ultra Beast
Its great to see the set featuring one of the best, and most aesthetically pleasing holo foil designs, especially as its not exactly expensive to pick up these cards, even if youre buying them individually from sites such as TCG Player or eBay
As an added perk, any time one or more +1/+1 counters are added to Pensive Professor, you draw a card