GiveawayBot.xyz

This bots allows you to hold giveaways on your Discord guild.
Login on https://giveawaybot.xyz/ and configure the roles that are allowed to participate and hold the giveaways.
Add the giveaway content on that website and start your giveaways by executing !g [time in seconds] in the giveaway channel.
You can cancel the giveaway by executing !g 0. Users in the allowed role can participate by clicking the reaction on the giveaway.
The winner will be announced and his price will sent to him by DM.