Dave, Knight in Time

Flying, First strike,
Whenever Dave, Knight in Time deals combat
damage to a player, untap each other attacking creature you control. After the next main phase
there is another combat phase followed by another
main phase. Then, until end of turn, Dave cannot attack.
Whenever Dave, Knight in Time dies, if it
wasn't attacking or blocking, return it to its
owner's hand at the beginning of the next upkeep.