Chances are they will target this card first, but King's Sarcophagus is often a more valuable target
Grist, the Hunger Tide One of Duskmourn s most popular reprints, Grist, the Hunger Tide comes with a powerful ultimate, and it's cheap enough to recast if it dies after activation
The most popular titans (including the mono-colored cycle and THB s titans) have abilities that trigger when they enter the battlefield or attack
If the targeted spell has a triggered ability that copies it (for example, replicate or storm), the copies will be controlled by the player who cast that spell
One possible way to profit is to play enough cantrips and library manipulation, maybe mana producers, so that you chain through your whole deck (or at least enough to win)
Delver of Secrets is a mere 1/1 human, but its easy to transform into the 3/2 Insectile Aberration and start attacking on turn 2