Slither Wing's first attack is mainly used to stall and disrupt the opponent, as it discards the top card of the opponent's deck, which is useful when dealing with cards like Ciphermaniac's Codebreaking that can place specific cards on the top of the deck
This keyword-heavy buff allows you to pressure rivals while the Lifelink pads your total and Vigilance maintains a rock-solid defense
Indeed it is especially good against all haste dorks which accounts for a large proportion of the good aggressive cube dorks
When time runs out, if the game score is tied, then whoever has taken more Prizes is declared the winner
Modern simply wasnt ready to deal with a creature that big, that quickly, and that resilient to common removal spells
Its a fun card to play and should be in your mill deck merely for posterity so all will know about the OG mill card