When they accidentally buff Gangplank with patch 7.9
https://am-a.akamaihd.net/image?f=http://news.cdn.leagueoflegends.com/public/images/pages/2015/gpins/img/gp_preplank_3_heads.jpg
Infinity Edge 
COST3600 gold ⇒ 3400 gold
Zeal 
COST1300 gold ⇒ 1200 gold
Lord Dominik's Regards 
COST2700 gold ⇒ 2600 gold
ARMOR PENETRATION45% bonus armor ⇒ 35% bonus armor
GIANT SLAYER DAMAGE AMP15% ⇒ 20%
