A well-built Cube will provide many, many entertaining drafts with great card interactions
The attacked player will get the poison counters at the same time they take normal combat damage, with no window for any kind of response
It doesnt impact the board immediately and directly, its first ability isnt an effect that is generally considered to be worth a full card, and its second ability costs another card (the sacrificed land) for one cards worth of value (the 3/3 enchantment artifact interrupt mana source creature token)
Target creature you control deals damage equal to twice its power to target creature an opponent controls
TLDR An AI MTG card generator can help with rough ideas, names, mechanics, flavor, and art direction
He works great at bringing a large swath of mana and he'll stick around for longer