During the event, you can get 1 Access Chip per 1 Limited Summon to exchange for rewards*:
FLOOR 1
1 Ticket: 1x Yellow Rune (Limit 120)
4 Tickets: 1x Crimson Abyss Energy (Limit 10)
80 Tickets: 1x SSS Hero** (Limit 1)
Consume 80 access chips to unlock the next floor
FLOOR 2
4 Ticket: 1x Red Rune (Limit 50)
8 Tickets: 1x 20Hr Rubellite (Limit 20)
100 Tickets: 1x SSS Hero** (Limit 1)
Consume 120 access chips at floor 2 to unlock floor 3
FLOOR 3
4 Ticket: 1x Red Rune (Limit 75)
15 Tickets: 1x 24Hr Resource Pack (Limit 20)
120 Tickets: 1x SSS Hero** (Limit 1)
*Rewards are subject to change
**Different each Giant Tower Event
NOTE: Access Chips do NOT carry over to the next Giant Tower Event!