It says that if denial gets more votes or the vote is tied , copy the spell. Duplication is the default result in the case of a hung jury, and the caster gets to copy the spell in question if decision splits the vote
You gotta have access to this effect in UG
While attacking can be a drawback, you can always pick a good attacker to clone to minimize it
These two revealsAvatar Aang on June 20 and Yue, the Moon Spirit on July 26prompted huge runs on old Ally synergy cards from previous Zendikar sets, including Harabaz Druid
Jam your deck full of cards that let you exile the top card of your deck like Light Up the Stage and Reckless Impulse and then slam face with pumped up Thopters thanks to cards like Illustrious Wanderglyph and Neyali, Suns' Vanguard
The Goblin Warlock can only be summoned when a creature dies, via its Tragic Backstory ability naturally