Spend money to avoid waiting for a timer to expire.
"Yes: pay to get energy in KOTR, auto-refill energy in KOTR, finish fusion or card training faster, refill bouts in PVP/events, end defeated timer wait early, etc."
"Buy levels in limited time events such as ones for new outfits Assault tokens for purchase that allow you to replenish guild assaults"
"Most timers can be skipped with contracts, which are earned regularly but can be purchased with premium currency."
"You only have 5 hearts that take a while to replenish, but you can spend money to instantly refill your lives."
"Opening card packs takes time and you can skip it using coins (quite expensive though)"