You have to deal combat damage to an opponent to trigger it but it can be useful
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How to Initiate a Trade Navigate to the Social Hub tab in your app Click Trade Choose who you want to trade with Select which card you want to offer, then tap OK Wait for the other person to offer you a card in response Tap Decline to reject it, or Trade to accept and complete the swap How to Accept or Decline a Trade If someone has sent you a trade offer, here's what you need to do: Go to the Social Hub tab Click Trade Look at the card you're being offered Decline the trade or select a card to offer in exchange, then tap OK Wait for the other person to accept In the Trade section of the Social Hub, tap Trade to receive your card Which Cards Can't Be Traded
Hamon, Lord of Striking Thunder and Uria, Lord of Searing Flames each receive cards that modify their Summoning requirements to make them easier to fulfill and help you mount a second or third strike if the first isnt enough
Now that the rules have been revised, you can put Field Spells on each other, so it's resistant to destruction on turn 1, so it's less likely to break, but