Putting a land card onto the battlefield with the last mode of Insidious Fungus's ability doesn't count as playing a land
Stone could certainly be applied to plenty of artifacts in Magic, but Infinity wouldnt really work as a general artifact type
Everyone who plays it has had it rot in their hand, though, so it has its limits
The token created by the additional effect of Coiling Rebirth isn't "cast," so abilities that trigger when a creature spell is cast won't trigger for the copy
Creature - Homunculus Color tag templates(None) Invisible Stalker Hexproof (This creature can't be the target of spells or abilities your opponents control.) This creature can't be blocked
Also, a shout out to Griselbrand that costs eight for a 7/7 flyer with lifelink that can swap 7 life for 7 cards and was so broken in older formats like Legacy that reanimated him, or cast him with no additional costs that he was really a one-dork format for much of its run and answers like Liliana of the Veil rose to the top