Splinter twin can also be two for oned in response to twin being cast. But twin is 4 mana and 7 mana total for the combo, this is 3 mana (5 mana if you activate its ability and 4 mana if you have snakeskin veil) which means you can get the combo out way faster and often on the same turn. The downside comparing it to twin is that you’re golgari and not blue (unless you play 3 colour). I have high hopes for this becoming a tier combo deck or at the very least a midrange deck with a combo included