The last ability of Clive's Hideaway will allow you to cast both exiled cards without paying their mana costs (assuming you control four or more legendary creatures at that time.) In a Two-Headed Giant game, Traveling Chocobo's second ability does not affect triggered abilities of permanents your teammate controls
If a token is exiled this way, it will cease to exist and won't return to the battlefield
Heliod, Sun-CrownedHeliod, Sun-Crowned and Walking BallistaWalking Ballista can utilize +1/+1 counters and lifelink to ping down the entire table, while Scurry OakScurry Oak and Ivy Lane DenizenIvy Lane Denizen can create an infinite number of Squirrels
Destroy all permanents with the same converted mana cost as the result of the die roll
Walking Ballista Walking Ballista is another of the cards that I first gave me the motivation to work on this series
By far and away the best use is as a two drop where it is most on curve for power level