Leave Them Hanging (Red)

Suspense

When this enters the arena, intimidate target hero.

When this leaves the arena, your next attack this turn gets +4

Rulings

From the Super Slam release notes

Leave Them Hanging’s first ability triggers when it enters the arena (e.g. resolves on the stack or when it is put into the arena from another card’s effect). This is a targeted effect: you must target a hero for this triggered effect when you add the triggered effect to the stack. You will intimidate that targeted hero when the triggered effect resolves.
Leave Them Hanging’s second ability triggers when it leaves the arena (for example, when it is destroyed, when it is banished, etc.). When this triggered effect resolves, your next attack this turn gets +4.

Keyword notes

Suspense - This enters the arena with 2 suspense counters. At the start of your turn, remove a suspense counter from it. When it has none, destroy it

Suspense is a new keyword ability featured on several Guardian cards in Super Slam
Suspense has several effects associated with it. The first effect the ability generates is a self-replacement effect that occurs as it enters the arena (e.g. resolves on the stack or when it is put into the arena from another card’s effect), which will put 2 suspense counters on the card.
Suspense’s second effect triggers at the beginning of your start phase. Neither player receives priority during the start phase of a turn. You will remove a suspense counter from it when the triggered effect resolves.
Suspense’s third effect triggers when it has no suspense counters on its card. As this is also a state-based triggering condition, the card must also have no suspense counters on it at the time the triggered effect begins to resolve. You will destroy that card when the triggered effect resolves. This can cause other effects to trigger (e.g. when this leaves the arena, etc). If this happens during the start phase of a turn, then neither player receives priority; however, if not having suspense counters on the object is triggered during the action phase, players will receive priority as normal. If a suspense counter is added before this effect resolves, then this triggered-layer will fail to resolve and the aura will not be destroyed.

All keywords

Intimidate - A brute mechanic that showcases how frightening a brute is to its enemies. Intimidate removes a random card from a hero’s hand until the end of turn, making it more difficult to defend.

The player who owns the banished card may look at it.
The card banished from intimidate is returned to hand at the beginning of the end phase. This is before players draw up to your (hand size).
You may target yourself with this ability. However you will receive the card back into your hand before drawing up to your (hand size). (Intimidating yourself is a very rare circumstance.)
You may target a hero with no cards in hand.
If there are other banished cards that aren’t from intimidate, it is encouraged to keep intimidated cards seperate from these cards.
The card banished from intimidate is returned to hand at the beginning of the end phase. This is before players draw up to hand size.
You may target yourself with this ability. However you will receive the card back into your hand before drawing up to your hand size.